When searching for something Zune related today I found a file on Microsoft's website called ZunePackage40.exe (
Download details: Zune 4.0 ). It self extracts to the file you have chosen and in the file there are several installer packages as well an installer to install them for you and I installed the many random packages and now have Zune software 4.0 on my computer but it crashes before it opens and asks me if I want to Send an Error Report. It will not allow me to uninstall it either I get the same message trying that as when you try to install it with the regular install file. Now I am wondering if there were some file(s) you can edit to make usable on XP 64-Bit.