How do I assign the Vista sleep function to a MS keyboard "favorites" key?

My old MS keyboard had a dedicated sleep button.  It was very convenient.  My new MS Laser 7000 keyboard does not have a dedicated sleep button.  I would like to assign (program) the sleep function to a favorites key.  You could do this in XP with a command of rundll32.exe powrprof.dll,SetSuspendState.  By the way, I'm aware of the [Windows Key]+[Right Arrow]+[Enter] shortcut.

Can you help?  Thanks.