Right, you'll just need to buy a cable (DV to Firewire) and hook it up to your PC.. Then use whatever software you like (Adobe Premiere, VirtualDub, Windows Movie Maker, etc..) to capture the video off of the camera.
Sometimes, those editing cards have MPEG chips on there that can convert the DV AVI files into MPEG2 on the fly, without using any major amounts of your CPU power. For the most part, though, it's fine to just capture to AVI (without a capture card), then edit what you want and convert later (takes more disk space than going directly to MPEG, though).