make seperated files.
#!/bin/sh
#Go to the prboom dir/folder
cd gp2x/Doom
#Laucnh prboom using Doom 1 IWAD, two additional PWAD and a Dehacked file.
./prboom -iwad plutonia.wad
# sync the SD card so that everything (saves games, config, etc.) is written.
sync
# return to the menu screen
cd...