I've been told not to repackage an existing msi (from a vendor), but when I open the msi using developer or tuner, I cannot add merge modules. Is there a way to convert the msi into an ism so I can perform this action?
In Developer, you can pull down the File menu, select Open, select the "*.msi" mask, and select Wizard from the "Open As:" list. This opens a conversion wizard that gives you the option of creating an ISM project file...