I don't think Vista cube is compatible with this config tool. It does work with S3 Cube Edit (
http://forum.ppcgeeks.com/showthread.php?t=26183), but I do find thisguyinco's tool has a few options that didn't make it into S3 Cube Edit (icon preview, ability to set text, and a little better selection UI). Nothing against what Spunks3 put together -- S3 Cube Edit gets the job done and sure beats manual reg edits!
That said though, to thisguyinco, what would it take to make your app compatible with Vista Cube 2.0 and S3 cube?
