You can export an XML (version 1) of your timeline from Studio and open it up in FCP 4.5. It works slick for video, but for any non-video media you have it’ll be a pain.
I just tried it decided it was smarter for my purposes to make the time to install my other copy FCP Studio on that machine instead. It’d been sitting in my office for months anyway. Figuring out the non-video media part on my timeline waould have been a substantial undertaking. Might have taken me longer than upgrading! (ok, not really, but…)
That might not be the right solution for your situation, though!
debe