What I know about calling the command line is
c:\Program Files\internet explorer\iexplore http://www.comfyseat.com
Thank you.
These were from 4.0. Should work in 5.0.
http://support.microsoft.com/support/kb/articles/Q178/0/58.ASP
"COMMAND LINE Switches for Internet Explorer 4.0 "
-nohome Open up Internet Explorer and override the Homepage settings
-channelband IE as a Desktop Toolbar, displaying the Channels Directory of the currently logged on user. This option only applies when Active Desktop is off.
-e Launch IE in Explorer mode (standard two pane view, My Computer on left, Content on right)
-new Start up IE in a separate process.
-slf Launch IE and connect to default home page. Loads the default home page from the cache.
-k Launch IE in Kiosk mode.