Check the official site, might have some archived area somewhere, though unlikely.
I'm going to go and assume you have a legal version, considering otherwise you really shouldn't be releasing anything, in which case if you ask them nicely then they'll send you it via e-mail or something.
Of course, this is unlikely, so you might want to check a p2p program, they're always a few years behind everything else.
As said, 6, 7 and 8 only works with dex script, and the dex script is not as good as art tools. So the best thing is to search for 3ds 5 on googl... *couch*dc++*cough*...
