Well, I think that I may have cracked the first part of my query. I've used CinemaForge 2.0 (good programme) to convert from .mov (which I think my be a Quicktime file), to a temporary .mpeg file. The.mpeg file is recognised by Windows Movie Maker- I've managed to rotate it in WMM, and have it saved as a DV-AVI (PAL).avi file.
I still want to put this, and other digital camera clips onto a DVD that I can play on a domestic DVD player.
Any answers out there?