Yeah. for XP it's
/run sysdm.cpl 
That doesn't account for the rest it though,
opening/closing "sysdm.cpl > Advanced > Environment Variables"/run rundll32.exe shell32.dll,Control_RunDLL sysdm.cpl,,3
Gets as far as "opening/closing "sysdm.cpl > Advanced" but still not to the "environment variables" page
