Halo 3 Zune Content Problem

Ok, so I have the Halo 3 zune. It was synced onto my laptop until now. So when i synced it to my Desktop all of my preloaded halo 3 things got deleted. Is there anyway to get them back or should I just call Microsoft?

No you cannot get this data back. When you plug in the Zune it asks you if you want to make the computer your home and if you do that you also get a message that states if you do this it will import any music on the computer onto the Zune and will subsequently erase whatever is on there.

I believe there is also an option to use the computer as a guest or visitor. You should use that.