I have a JVC miniDV camera that I tried for over a year to make movies with on a window machine, buying firewire cards, downloading patches from pages translated from Russian.
The result was always a blocked mess. One tip was to do a defrag, but the thing wasn't defragging, another problem to sort, spent a weekend or two trying to resolve inf issues to capture stills after it wouldn't recognise the camera anymore, etc, etc, etc, etc, etc.
Bought an iBook, and was making movies within five minutes, going wow, that looks great.