Doesn't Win 7 give you this capability John Pryal refers to above.
CTRL+Tab normally does this in most programs anyway at least in SolidWorks which Wildfire 5 finally fixed their 90deg only ellipse rotation and RMB Context Selection constraints with.
Have you tried that. The tabs are a lot less ugly than the Slew of windows and CTRL+A Activate window problems that have existed for years.
Michael