Help, i've read all the messagess on the posts i've read the online help and i still can't get links to work on NT 4.0 with service pack 5 and IIS 4.0

this is the message i get
%1 is not a valid NT application.

if i change the permissions or rename the .cgi to .pl like many suggested the file wants to download instead of running on the web server.

i've read about maping, but i haven't read no post on how to do it exactly, can anyone please explain in detail how to add mapping so that the .pl files (or .cgi files) will run on the browser and not try to download them.

Please help!

TIA


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Shanti-