Well first off:
If all your footage is PAL, you might better leave it that way for now.
You need to convert all footage to a format FCP likes.
PAL DV50 would be a good place to start. Mpeg streamclip is free, get it.
Once edited. Output “Current Settings”
Compress for web.
Convert PAL clip to NTSC clip while compressing for DVD.
Chris Tompkins
Video Atlanta LLC