(NEED) Popunder on action script - with a twist

I'm after a popunder script that allows me to specify certain IP's that the script will not execute on.

I own the site that will be using it, and the site is written in .aspx

The script needs to only execute once per session, on the first click I guess, like eg: thepiratebay, and the blocked IP's need to be bulletproof. The site this will be going on is jointly owned by me and my (soon to be ex) wife and she cannot know that I'm sending visitors to an affiliate.

I wouldn't mind sharing the script here when done either, if thats OK. I think it may prove popular.

I hate bumps - but I need this

I Think i can do this for you,But obviously need more details.Add me on skype.

did you ever get this script done?