Richard,
The software I linked to there are two ways I think to let the popups you like to come on.
1. There is a list of every place you go that tries to do popups. You can then pick from that list what sites you don't mind popups coming from.
2. There is some hot key on your keyboard that...
I even put it through the porn site super test. No popup ads with this software. It is 24.95 for a full license but it will stop 50 popups at a time without registering it. Then all you have to do is manually go in and clear out the history. It doesn't say it is for IE6 but I am running it fine...