i think you will need:
a bigger hard disc: DV video takes up 1 gig every 5 minutes
a firewire card (i think)
do you have a video camera? if so, does it have firewire(i.link/IEEE 1394) and analogue in/out?
if not, then i'm not the person to ask.
I've heard of analogue/digital convertors, but thats all i know.
hope this helps