I'm sorry; I was also looking for a fortrand compiler and downloaded the file, but I don't know how to install it.
I've tried tar comand and then both of the options presented here: http://www.cyberciti.biz/faq/run-execute-sh-shell-script/
When I use the "sh file NAME.sh", the output on the screen says that many files couldn't be found.
If I use the other option, "chmod" command runs fine, but ./NAME.sh returns the same output, yet it does some kind of installation because some more files are added to the folder.
EDIT: I have vector linux 6.0 light editin, if that's important...