I was tihnking of making a short involving some TV footage, but I am wondering how the best way to capture this is.

I have the hardware (PCI-Capture Card and Breakout Box) that came with Pinnacle Studio AV/DV Deluxe, although I have now moved away from Pinnacle software after S10 (those who've used it know why.)

How is the best way to capture TV footage, and what are the best settings? Is it worth capturing in DV (720x576 - although TV is 4:3.) Also, are there are sites out there that offer free (preferably high quality) downloads of adverts?

Thanks