Replace your slot machine glass pieces with the new ones that were sent to you in the kit. Some game kits only require 1 piece of glass.
 

Start with the top piece of glass. Remove it by opening the machine's main door and carefully lifting the old glass holder up and out of the cabinet frame. Install the new upper glass.
 
If your kit included a new belly (bottom) glass: turn the power off to the machine, then open the belly door by turning the key for the belly door (if equipped with a lock), then while supporting the belly door frame with one hand (to prevent it from falling open and damaging your current glass), grip the textured knob on the right side of the front door and pull it towards the right side of the machine (pull out on the knob -- this may take some force).
 
Gently open the belly door all the way and use the built-in cables to hold the door at its fully open position. Use a socket or wrench to remove the four nuts holding the belly glass light fixture in place. Once the four nuts have been removed, carefully lift the light fixture out of the way and the belly glass should now be loose in the frame. Carefully remove the glass (don't chip the edges!) and replace it with the new belly glass. Ensure the orientation of the new glass is correct for what will be displayed when the door is closed. Place the light fixture back in place and replace the four nuts to hold the fixture and new glass in place. When closing the door, double-check that it has fully latched (and isn't in danger of falling back open and damaging your new glass).
 
If your kit included a new reel glass: turn the power off to the machine, then with the door open, use a socket to remove the nuts holding the LED display board to the bottom of the reel glass. Once all of the nuts are removed, gently remove the LED display from the current reel glass (it may be slightly adhered to the glass from age) and gently let it rest hanging down, out of the way. Next, remove the fluorescent tube at the top of the reel glass by twisting it out of its socket. That will reveal the nuts that need to be removed to remove the fluorescent tube fixture which holds the top portion of the reel glass in place. Use caution when removing the final nut, as the fixture will want to fall down, and the reel glass will be loose and can fall out on its own at that point, too. Replace the reel glass with the new glass, then reinstall the fluorescent tube fixture, the LED dsiplay, and replace the fluorescent bulb in the fixture.
 

The reels will be numbered in the order that they are installed in the machine from left to right.
 

Lay out the new strips on a flat surface and take a comparison look at the strips different symbols. – If they are all the same and all the symbols line up with each other then you do not need to be concerned with which strip goes to which reel. If however, any strips are different from each other than you will need to install them in a particular order depending on the game.

Your new reel strips have small notches cut in them at the bottom. There is also a matching notch on each reel basket. The notches on both the reel strips and the reel baskets must
be installed so that their notches are aligned to together in the correct positions in their reel baskets. - In addition most (Not all) strips will be numbered either at the very bottom or on the back top side of the strip. Generally the lowest number strip will be installed in the left reel, usually marked as #1 and the next higher # strip will go to the middle reel and the last one installed at the most right side reel. There is an exception to this rule that being if your reel strip set has different symbols, you will install the odd number strip in the middle or right side depending on your game.

The easiest way to locate the notches in the reel baskets is to place a reel strip into the left side groove of the basket that it is to be installed into and hold the strip at a 45 degree angle to the basket with one hand and use the other hand to rotate the basket slowly until you feel it catch on the notch. Then, proceed to roll the strip around the back side of the basket and as you do tuck both sides into the grooves of the basket until you come back around to where you started.
At this time you want to make sure that  the end of the reel strip overlaps the other end of the strip and that they are seated together with the self adhesive sticky surface on the inside of the strip. (You may have to use clear scotch tape to secure the strip to itself. If you did this correctly, you will not be able to see the notches in the strips after you are finished and the reel should spin straight and true.

NOTE: - MOST GAME CHANGES ONLY REQUIRE THE "REEL" (SS) EPROM TO BE CHANGED. DO NOT REMOVE/CHANGE YOUR "GAME" (SP) EPROM, UNLESS YOUR NEW GAME SPECIFICALLY REQUIRES IT TO BE CHANGED. (If you do change the "GAME" (SP) EPROM chip you will lose the operational function of your Bill Validator and it will require a special Set Chip to re-activate it) - Because of this, most Game Kits will not include a GAME EPROM.  

Changing the REEL chip

IMPORTANT: Turn the machine's power OFF before removing or inserting the MPU board. Failure to do so may damage the board or the machine.
 
Open the main door and remove the coin tray by lifting up on it. Remove the hopper by pulling the metal handle towards you. Next you will need to remove the MPU board tray from the machine.
 

 
Remove the MPU tray from the machine by pulling straight up on the black round knob. Once it "unlocks", gently pull the tray towards you.

Locate the chip clearly marked as the "REEL PROM" on the main board and using a small flat blade screwdriver, gently pry up one side of the chip by carefully inserting the blade end of your screwdriver between the chip and its holding socket. Make absolutely sure that your screwdriver is between the EPROM and the socket (and not between the socket and the circuit board, causing you to pry the socket off of the board). You will start at one end and then go to the other end and gently pry up on that side, then return to the side you started on until the chip is dislodged evenly from its holding socket. Try to pull it out as evenly and straight as you can so you don't damage or bend any of the chips 28 pin legs. If you do you can straighten them out again but just try to be as careful as you can.

Install the new "REEL" chip included with your game kit in the same direction as the old one that you just removed. This means the notch in the chip must install in the same direction. Note that the paper labels may not be in the same orientation -- always look at the physical notch in the chip, and ensure it matches orientation with the notch (half-circle cutout) in the socket. Use caution when installing the chip so that you do not fold over any of the chips pins. Go slowly and re-check all the legs as you go and again afterwards. If one or more of the legs do get bent, you must straighten them before proceeding. Next, push down on the top of the chip firmly until the chip is seated all the way in its holding socket.  

Initializing the new game:

 
Reinstall the MPU board tray into the machine, opposite of how you removed it. Place the tray into the correct location, then use the knob to apply downward pressure to get it to mate with the fixed motherboard that is in the base of the machine. After installing the main system board, install the hopper and turn the power switch on. The machine should come to life and you should see a "61" displayed in the winner paid window. It is possible that you may see a 65, 66 or 67 in the window instead. See the below illustrations and pictures to see what you need to do for each code displayed

If you see a 66 or 67 code after making a chip change, power off the machine, then back on. You should then see a 61 displayed in the winner paid window.

When you get a 61 press and hold the white test button next to the power switch until you hear a "Ding" and the display changes to 61 1.

 
Once you get a 61 1, close and latch the door completely and turn the jackpot reset key on the side of the machine one time.

Note: a common problem that occurs after a game change is that you will see a 61 1 code after you hold the test button in and hear the "Ding", but when you close the door and turn the reset key and nothing happens. This is usually caused by an open door to the cash storage container or a misaligned bill validator. Check all your doors to be certain they are completely closed before closing the main machine door. If you encounter a 65 error, or any other error code not listed here, check the Common IGT S+ Error Codes and Resolutions FAQ for further information.