From what we (in my company) have learned, to fully support drivers installation on Vista one needs to use DIFx ver. 2.1, but the current version of the AI (5.1.1) uses version 2.01

This forces us to manually include the newer version of the above merge module to our installers and causes a lot of hassle.
Could you, please, include the newest version of the DIFx in the AI 5.2? I know that the InstallShield 2008 uses the most recent version of DIFx (see page 3 of http://www.macrovision.com/webdocuments ... em_Pro.pdf), so I guess you could switch to it as well.
Thanks a lot for your help,
Rafal