Hello.
I install in my PC mac os snow leopard 10.6.6 and I can't find and install my sound driver.
I beginner in mac os.
My PC is intel i5 RAM - 4GB.

Help me please to resolve my problem.

Are you trying to install MacOS X on a Windows PC? If so, then this is known as a Hackintosh. It is a violation of the rules of this forum to discuss Hackintoshes or to help others do the same.