Depends exactly what you mean.
I have the front plate from my LianLi case that has mic, headphones, 2xusb, 1xfirewire out of my case as I don't need them. This sort of cable/item normally comes with all cases. If there is a firewire port on your case, then that will have a cable that can be plugged into your motherboard, but only if you have onboard firewire connection, which if there is nothing out the rear of the mobo I doubt you will have any.
As for the OP, I'd have thought most video editing packages, such as ones from Pinnacle that are firewire cards should work under Vista. Vista may just pick it up as a generic firewire card.
Personally I have no experience with this, as I've had firewire on my motherboards for years, so on Vista it's quite happy with the onboard one.
InvG