iTunes purchased music folder

Okay so I had problems with my itunes and lost all the ratings and play o****s (oh well I'll live)
But what REALLY annoys me is that my purchased music from ITMS doesnt show up in that folder. Is there any way around this?
Thanks

Is this in relation to an upgrade to Leopard, Mark? Or did this just happen out of the blue?

Bit of both. It happened because I upgraded, but I deleted the library and cant find the correct xml file to bring back in.