When you back this unit up to a cd, if you want to watch it on a pc, do you need special software, or will it play in whatever media player you have? Thanks.

the nuvico systems are programmable to automatically load the required software for viewing on the the burned video cd, therefore you can play it in any pc transferred to . i think you also get a seperate cd from nuvico that contains a file for that software as well, or you can download it from their website

How is this Nuvico dvr? is this a DV2 / DV3/ or a DV4? I am planning to buy one and you would be the best person to get this feedback. In this play back mode can you see recorded videos for all the cameras at the same time?

i have a dv2 series, yes playback includes all camera footage when displayed in a multi camera setup like quad, 4 cameras and so forth

The DV3 and DV4 series is a big improvement on their DV line of DVRs. Better user interface, higher FPS and MPEG4 recording.

The DV3 series DVR's are a very good seller these days.