Windows 7: Lost my WMP11 music ratings from the upgrade, is there any way to get them back?

Hi all, like the thread title says I've just installed Windows 7 from Vista using the upgrade option and now all of my music ratings seem to have disappeared in the new Windows Media Player. I made a backup of my users directory before I performed the upgrade, is there any way to import the ratings back into Windows 7? I really don't want to have to manually rate every single song again.

Thanks for any help!

Tom



Edit: I managed to fix the problem, I had my ratings stored in the music files themselves and WMP was storing its own ratings separately in its database. I just had to tick "Maintain global star ratings" before adding the music to my library to use the file ratings.