I'm trying to figure out how to build an MSI installer to install a server application. I have an existing MSI that I've exported from another server. tThe problem is that I need to install with a different GUID so I can have two different client versions running on the same workstation. This is a very old app and I have no idea how the original MSI was created. I broke compatibility and recompiled the DLL and recompiled, thinking this would create a different GUID but I have no way to install it on the new server.
Any help will be very appreciated, as time is of the essence.