Like I said last time you asked a question like this: DO YOUR OWN LEGWORK!
Go to the website of the company that makes the hardware you're trying to find a driver for. If a Vista driver exists, that's most likely where you're going to find it. You can also try Google, with something like: "<name of hardware device> vista driver" and see what pops up.
I would also strongly suggest making sure that there is a Vista driver available BEFORE you buy any more hardware.
Driver for Veo Webcam for Windows Vista