I think we all can download the car skin Sentinel To Bmw http://www.gtainside.com/en/download.php?do=download&id=33284
If all know how to insert the car skin its good but if someone don't know how to insert look the bottom of the topic.
1.) Need To download gta sa andreas Mod installer P.S you can get it to http://www.gtagaming.com/downloads/gta-san-andreas/tools/1352 .
2.)Save the WinraR File To Destkop or where you want and click Ok !!
3.)Now Whait When He Finish
4.)When He winish Open The File (Or He Will Open Himself )
5.)Drag Him To The Destkop
6.)And install (it's Fast)
7.)When He Finish Open The Mod Installer and click to the ''install a mod ''
8.)there are two tables select the second
9.)click to second table bronswe and select the winrar map where is the downloaded car skin and click next to the all cars names
10.)Tape the car name and install !
11.) Now Find The Sentinel (BMW) In Gta And You can drive