[Dale Robinson]"Can a PC read Apple Pro Res 422 files ?"
It can if it has the latest version of QT 7 for Windows. Not QTX, but QT7; QTX may not even be available on Windows, which is a good thing. If you want to make double-dog sure there are no problems, send ProRes HQ Files.
And for the return trip, I heartily recommend PNG image sequences in AE. I cut on FCP at work, and occasionally do AE work on my home Windows box. That's how I do the round-trip. A 30-second spot including the source video from FCP and the renders from AE will fit comfortably on a thumb drive. Plus everything's lossless! An added bonus: PNG sequences will support Alpha Channels.
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA