Well, I just use PowerDVD to take screencaps of 
DVDs and then ACDSee's FotoCanvas Lite tool to 
shrink the cap down to size.  That's it.

As far as nice caps go, it usually depends on 
the quality of the DVD.  There are quite a few 
DVDs out there that just look like crap.

As far as 'crisp' caps go, FotoCanvas Lite has a 
resizing formula (Lanczos set by default) that 
doesn't make shrunken pics blurry.

Basically, 720x520 screencap (or 720x480 without 
auto resize) taken by PowerDVD -> 320x240 
screencap via FotoCanvas Lite.  Not sure if that 
helps any, but that's how I do it.

Later, yo.