Rename %ProgramFiles%\Internet Explorer\IEXPLORE.exe to something else, name your app IEXPLORE.exe and put it in it's place, then spawn your renamed ie from your app. Wou might wanna pass any command line arguments to it aswell. However, things like system restore on windows xp and some virus scanners might not let you do this as it could be classed (and i use the term loosely) as a "Virus"