Kev,
Getting a screen grab isn't too difficult (with the right software
). The problem is that the screen / dvd resolution isn't that great with PAL DVD being approx 576x852. Soooo....It's near impossible to get a picture of that resolution blown up to a decent size.
Jason
Capturing stills with power DVD
http://classweb.gmu.edu/tec/video/powerdvd/PDstill.html