The developers of QuickTime Alternative released an add-on to solve the iTunes 8 compatibility issues. I made some testing with my x86 installers and they are working fine.

I will make x64 versions tomorrow and will upload all the builds.

Meanwhile, you can get the add-on here.

• QuickTime Alternative 2.7.0
• iTunes 8.0.2.20 Switchless Installers
• iTunes 8.0.0.35 Switchless Installers
• iTunes Switchless Installers x64
• QuickTime Alternative 2.1.1