Most Vista changes are not hard to overcome. After some digging, there are only two issues left. One is that Expert Manager cannot delete a registry because of UAC or some other security feature of Vista. And the other is a new naming schema for CBC GrapeVine packages.
For the latter, I have just made up my mind. Every package will have a prefix gv which stands for GrapeVine. In this way, they can be distinguished from older versions.
I would solve the first problem at first then update InDate code to conform to the new naming rules.
I have uploaded another Preview version to GForge here. It is still a Preview, but much better than last one.
Stay tuned.
(Updated: UAC compliant will be achieved easily if a manifest file is used. Inno Setup creates Vista-compatible installers in this way, too. You can use Kenny Kerr’s Manifest View 1.0 to see inside them.)