I too have been experimenting since my original query.

Using Nero I appear to be able to process the PAL input (camcorder converted into an avi file) as either PAL or NTSC (if I want one of each I have to transcode twice). Then I appear to be able to write an ordinary dvd without any change in settings. Both play on my dvd player - the PAL exactly as I would expect (it is my native TV type) and the NTSC is a bit jerky as it pans (which I am used to from tapes and is due to the extra frame being added or dropped - can't remember which). As I'm off to the US for a visit in 4 weeks I'll take a possible NTSC one and see how it plays.

I'll report back!

Nick