The software is installed though, correct?
If so, you can find the drivers here:
http://www.zuneboards.com/staff/Darren/Zune+Drivers.exe
It is a simple extraction and will replace with clean drivers.
If you have not installed the software successfully, try the SZIP full package.
It is located here:
http://www.zuneboards.com/forums/zto...ip-v2-5-a.html
If you have any more problems, just let us know here.