Use the context menu under right button to unpack with SAPCAR.EXE. Here's how:
2)click on OTHER;
3) choose car.exe or sapcar.exe;
4) click ok;
5) find in registry key:
6) go to subkey shellopencommand and edit string like C:Tempunpack_carcarSAPCAR.EXE -xvf "%1" adding entry -xvf;
go to subkey SAPCAR.EXEshell
and edit your discription in context menu like
"unpack with SAPCAR.EXE"
7) right click on car or sar file, choose OPEN WITH and choose "unpack with SAPCAR.EXE".This will decompress SAR and CAR files in the current directory.
This was first published in May 2003