I use one called SmartPopUp Killer it works great and all you have to do to override the thing if you want a window to open up is hold down the ctrl key. Plus it has a cookie manager that will auto delete all cookies except ones you specify every time you close I.E. And best of all its free.
http://download.com.com/3000-2144-10214943.html?tag=lst-0-1 
'00 Blk CSVT #1087/2150 built 12/23/99
