I know it works like you're talking about, I'm just not positive how to do it. This is just a guess, but I think it'll work...

You can probably write a perl script that opens the file from a cgi param. You can then print the file to the browser. Then if you instruct your users to click save link as and save it as a new filename they should be able to have it work. But again, this is just my guess.

- p u n k k i d
"Reality is merely an illusion, albeit a very persistent one." -Albert Einstein