The gtasam.zip file you have requested: Tools and Utilities / GTA San Andreas Mod Manager - 490.81kb is not available. Perhaps try browsing all files for the game Grand Theft Auto: San Andreas and upload any files you want to share or are missing. This is the only information we could locate:
Here is the GTA San Andreas Mod Manager, this will allow you to switch between different modifcations that would normally overwrite files such as the main.scm and script.img. This file is highly recommended.