>1. They are sending me Visual Studios 6.0 Enterprise Edition Service Pack 3. Is this the correct version? All I want to do is patch VFP 6.0 so that the C0000005 error goes away.

Yes.

>2. When I get ready to install the Service Pack, are there any tips, tricks, or warnings that I need to be aware of??

Ummm... make sure to install it on each users' workstation.