XtremeMod's has posted a very excellent how-to on rekeying your keyboard. I know many of you have wanted to paint you keyboard including the keys, but have run into a dead-end when it came to putting the letters back on. Well this is the how-to for you!
"How many of you have thought about modding your keyboard? My guess is that you came across the same problem that most people do: “How do I paint the keys and still read them?†For those of you with raised letters, you may have tried to paint your keys already. Some of you may even trust your memory of the keyboard, but most likely, you have just avoided painting the keys, painting only the keyboard case. Then there are those who have just given up the idea, after all, you can’t type with out a keyboard, and paint doesn’t dry completely in a few hours.'
Peep the full How-to
here