move the gta3.img folder to some folder inside the modloader
copy any of the files from the GTA San Andreas User Files folder and paste it into the GTA San Andreas User Files folder on your computer

Mission made by: CSJ
Aliens Texture and Model: Diego4Fun

(For developers of DYOM missions)
The "Editable Mission" file is the original version of the mission, if you want to study it, change the name to DYOM1 / DYOM2 / DYOM3 etc and move to the GTA San Andreas User Files folder.