You play Gta Underground and want SA missions?
You can play now with this mod in DLC style to play the original SA missions until i upload a beta of the Storyline Missions mod (All gta/manhunt/bully missions on underground) that im working on. (so what it does, is a new executable, you keep original Underground stuff in gta_sa.exe and the missions on gta_sa_main.scm.exe, with all underground cheats (like Carspawner Weaponspawner and all other cities cheats like Thugstools etc)
Simple to install copy gta_sa_main.scm.exe where gta_sa.exe is and copy scripa folder and gsa.dat to data folder... or copy data folder where gta_sa.exe is (this will not overwrite anything).
Thats all. Some pictures. So you can see it working.
This is not a bug: Some Underground stuff are defined on the main.scm in /script/ folder and if you play on gta_sa_main.scm.exe you will miss some thing (like travelling from SA to VC or LC or custom missions on other places, buy properties on other citys etc) This is not a thing to be solved on this.
POSIBLE BUG: if you quit gta_sa_main.scm.exe maybe it will be a time in task manager, you can wait or you can kill the process from there.