Hey guys,
I'll be showing a tutorial to restore ur gta3 img if you did not make a back up of it. (Win7)
-Right click on gta3 img file. (You will find it in the 'models' folder in your GTA-SA directory)
-Click on 'Properties'.
Something like this will appear:
-Click on the option 'Previous Versions'
Screen:
-Now you can select the version you want to restore and click on the 'Restore' option.
Regards
Areeb