Steve, with regard to the serial number I think he's referring to the bundled version of "VideoStudio DV" which was included with his card. Is that correct bstillwell?
If so, software of this type often includes a pre-loaded serial which may appear grayed out when you run the installer. In this case you shouldn't have to enter it manually in order to install the program. Outside of that, the original vendor of your card might be your only hope although obviously they have not been helpful.
For what it's worth, I believe your bundled "DV" edition is a lite version of VS5 which dates back to late 2001 or thereabouts. If so, whatever functionality it offers would be quite a bit less than the current version, VS10.
Good luck
