If it is on DVD, then WinDVD or CyberLink PowerDVD can capture screen shots at any time by the click of the mouse and automatically save in .gif or .bmp format.
If they are in .mpg format then you can use any of the other software products mentioned here to enter into an editing session and do screen caps from within.
Thank you, also, for that information. Considering I'm getting the footage from various sources, I think I'm going to be working with both of the formats you mentioned above.
Thank you - I ended up using your suggestion since we already had IntervideoDVD on this computer. Worked like a charm! :-)