in an old version of setup.exe it was possible to patch the name of the used setup.ini. Does someone know, if there's a way to use an other setup.ini within the current version? ( other name or other directory? )
Are you asking about in Suite projects or in Basic MSI projects? Suites do not have this feature (the rough equivalent to setup.ini, setup.xml, is embedded in the executable). I would not expect Basic MSI support for this to have changed, so if this worked before, I would expect it to still work.
