"Run" from Windows Start menu

Hello,
is there a possibilty to run programs like I can from "Run" in the windows start menu?
I'd like to make a silent-install from firefox with a profile creating automatically from the installer. For this I have to run firefox like this:

firefox -CreateProfile JoelUser
( https://developer.mozilla.org/en/Command_Line_Options )

Please read the manual. NSIS has Exec and variants.

Stu