Windows 7 problems and cant get bootcamp on Windows 7 HELP!

Installed windows 7 from bootcamp 64bit to be exact. My problem is I couldn't get sound on there, not all the keyboard keys work and more. I cant get bootcamp on there because it says that it doesn't suppost 64 bit. I can get to the files but I dont know which to install from the OSX 10.5 disk.
These are my specs on my IMAC.
24" IMAC , 3.06ghz DUO 4gb memory NVIDA 8800