This is a Program Manager for WINE. There is a checksum in the Microsoft `*.grp' files. I don't know how to calculate it. Therefore the group files written by this Program Manager cannot be used with the Microsoft Program Manager!! To prevent overwriting original files: If there is an existing `*.grp' file this program uses the extension `.gr' instead. It's possible to use an alternate `progman.ini' file by adding to `wine.conf' something like: [progman] progman.ini=/my/wine/path/progman.ini