I'm not an expert on this sort of thing at all but I think the others will need a bit more info about what you want the software to do. I can't advise as I said its not my thing but I can see the others will need more info. Firstly is it XP you have, how fast is your computer, how much memory and how much hard space do you have? Also what do you want to do? You mention VHS. Do you wish to copy VHS to DVD or what do you actually wish to do?
If you just wish to copy from VHS to DVD without any editing and mucking about its faster and much easier just to get a DVD recorder and copy via the SCART from the video to the DVD as VHS is analogue and before you do anything to it on your computer you need to convert it to digital, or so I have been told.