All,
Here is the solution from the Microsoft IE team.
Please use the instruction below to disable the pop up blocker message via Registry. I have tested it and it works 
===================
- Resolution:
Reg key provided by the IE team
Create a dword reg key “TabProcGrowth” under:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\MAIN
AND
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
TabProcGrowth (dword 32-bit) with value = 0
===================
Hani
