place everything from "GTA San Andreas" into your GTA installation directory, backup files which exist, because you need to overwrite them with this files.

plugin_ShowMessageBox is a example plugin for Pawn4Singleplayer

source - this is the source.


Please read \GTA San Andreas\readme.txt or not.. whatever.

in \user_made_stuff\ there are plugins, scripts and includes made/submitted by 3rd parties (samod users)
All credits go to their respective authors.