I realize from the help file that when adding a user or group, that the installation will fail if the user or group already exists.
Can you add a condition that will check to see if the user or group exists already and not attempt to add it again if so.
I have a lot of systems, where some of them have already been manually setup with the appropriate groups and some have not. If I implemented this optin in my installer, my install would fail on all the systems that already have the group/user.
Thanks