Well, to be able to uninstall something with the 'new' package, you will have to repackage the msi you wish to install to 'upgrade' existing packages (you'll add the gui for that package, and thus it will be removed if it exists). What do you mean with a non msi-setup? does the earlier versions use installshield? aaah, it's to seperate programs, now I follow (reading your line at the same time). Well, you could always build your on uninstaller and bundle it up with the msi (as a mst perhaps) for the new program.

How ever, you you're gonna do something that does not involve repackaging the msi, I suggest that you first see to that you uninstall the programs you mention seperate, then via a gpo install the msi later on.

EDIT: Packeting and repacking in my text is refering to doing it with Wise or another program..
EDIT2: I should be quiet - you're looking for ways to do this with kixtart, not wise or any other (re)packeting-programs.
EDIT3: What you could do, is simply in your gpo for the new program write a script that checks and if exists, uninstall the non-wanted programs.

Edited by Björn (2006-10-06 12:41 PM)