PAL is captured to PAL, which means capping at 25fps. Not hard to do with most cap cards/apps. Converting to NTSC isn't all that tough, either, since that 25fps was originally 24fps. AviSynth will let you call it 23.976fps, pulldown.exe (among other things) will put flags in the MPEG-2 stream to make it 29.97fps (with no additional frames needed), and the audio from any NTSC edition is already timed to match. Not magic; just a lot of fiddling around.