Spent some time reading the Wiki. I tried reinstalling Quicktime and tried basically every version of WinVDIG I could get hold of. As far as I know, you can find all the versions here. I did not go digging around to much in the System32 folder during these various installs/uninstalls. It seems that Vista's uninstall program takes care of the two files in question.
The error I am currently getting is:
0Laptop Integrated Webcam-WDM: SetFileName failed.
I have version 1.0.1 of WinVDIG on my computer. I was the least unhappy of all the versions.