How to upload to the idgames archive

I have a really old wad (gtwy2000.wad) on my system which I haven't seen anywhere else. So I was wondering: How is it possible to upload content to the idgames archive?

http://www.doomworld.com/vb/wads-mods/31922-newstuff-and-idgames-faq-read-this/

this one oughtta help, my lad!