OK, here's the deal:
Become an active member ( you are considered an active member when you make 10 useful
Make your ad post in the "Advertising" forum
PM "admin" (without quotes) with the name of your post and quoting "CFAD-STICKY"
If you don't stay active (i.e you don't post for a long time and you don't post an announcement in the general forum and you are inactive for a couple of months) then your post will be un-stickey'd.