This is pretty simple and has been covered over at BYOAC forums at least a few dozen times. Basically, the coin slots are connected to the machine via standard switches. All you have to do is wire up those switches to your controls in place of/in addition to your current coin buttons. To light the coin door, you have a couple options. You first need to know what voltage the bulbs that are in your cab require. If you are lucky, they will be either 5, 7, or 12 volt. If they are, you can connect them up to your pc via a hacked molex connector (5v = red + black, 12v = yellow + black, 7v = red + yellow). If the bulbs are not any of these voltages, you can either go to Radio Shack and buy a compatible bulb for your current bulb socket, or you can get a new socket and appropriate bulb (go with the first option if at all possible). As for switching the token slots to coin slots...it's definitely possible. The slots are typically modular so they can be swapped out without tools in a few minutes. Some slots can even be switched by just adjusting a set screw somewhere (to change the width of the coin). Be aware that if you have to buy new ones from HAPPS, the pair can get a bit pricey (IMO anyway). You need to know the brand of coin door you have though as I do not know whether there is a difference from one manufacturer to another.