1.open IMG-Tool
2.click on "File", then "Open"
3.go to your "Grand Theft Auto San Andreas"-folder
4.open your GTASA "models-folder"
5.select the "gta3.img" and open it
6.click on "edit", then "find"
7.write down "Stratum1.txd", then mark it
8.click on "commands", then on "replace"
9.select the "Stratum1.txd" (from the rar-archiv) and replace it
10.done