Though not Autodock, but still you can find free compilers to download at http://freeware.sgi.com/index-by-alpha.html As I see it is gcc 3.0.4 currently available, still you will need your sysadmin's help to install it. I do not know Autodock's code, if gcc3xx complains for old-style declarations/syntax, you can use the -fpermissive switch. Szilva