I found this but it didn't work. I'm running Win7 x64 RC1. When I try to install iTunes64 it installs to the x86 directory and is most defiantly the 32 bit installation. I get some issues with iTunes freezing whenever I try to use the 32 bit iTunes. I was before using the Beta 1 of Windows 7 and iTunes x64 installed perfectly for me (in 64 bit mode).