I found Power DVD 5 for sale quite reasonably 
cheap at a computer show.  It lets you capture 
multiple screencaps (just keep hitting the 
hotkey), and you can pause before doing the 
capture, and it lets you choose the resolution of 
the capture.  I'd been disappointed with the 
earlier version, and didn't like the capture 
available with the bundled dvd-viewing software 
that comes with laptops with WinXP either.  

Alternately, you can use Photoimpact 6 - activate 
its capture utility, designate resolution and 
where you want the capture to go (clipboard, 
file, screen), then play your cd/dvd, pause where 
you want it and hit the F12 hotkey.  Not as 
flexible as PowerDVD5, and it captures the whole 
window, so you'll have cropping to do, but at 
least an option.