Well you need to get the .grp out of the starship troopers install files - I renamed it to ssttc.grp and put it in the eduke32/ssttc folder
And directed the sctrip to this path - if that dont make sence let me know
Make a .dge file with notpad 2 and drop it in the eduke32 folder this is how it should look
./eduke32 -game_dir ./ssttc
The same goes for all mods - so hellduke would be example
./eduke32 -game_dir ./hellduke
make sure the hellduke mod, hellduke.grp is in its own folder called hellduke in the eduke32 dir...
Hope this help you run the mods :-)