Don't know, Tosh, but the long-winded way I would do it would be to dub onto DVD disk via your recorder, then edit them in 'Shrink' or 'Womble' on the PC onto another final DVD disk. Your other option would be to record from VCR in short edited bits and then put together, but I think (1) is better? I think it would have to be a 'high-end' DVD machine to allow full edit.
I think there are programmes which would allow direct connection of VCR to PC also?