keyless entry programming

Does anyone know how to program a 1997 Dodge 1500 keyless entry fob? I have one that is already working, but I need to program another one. Any help appreciated.

i dont know how to do itbut, i just happened to be looking that up also and found on ebay so far, a guy on there selling a manual for about $5. I'm tempting to buy it also if i cant find anywhere else to find out how.