SCAR scripts
SCAR scripts can be found at:
1. SCAR forums http://www.kaitnieks.com/scr/
2. There are many script dumps, use search engines to find them.

SCAR scripting
SCAR scripts use Pascal language. You can use www.google.com to find more information about Pascal.
SCAR built in function and procedure reference can be found in SCAR manual (menu Help > Help).