1 click access Server 2008 TS remote control

I need to allow a user 1 click access to remote control another MSTSC session.  
This is the Scenario:  Setup a Virtual Server, Windows Server 2008 R2 Standard edition.  All the users use RDP to access the desktop, the main user needs to review the work on several of the other sessions.  He is used to clicking on a logmein type session jumping from 1 logmein session to another.  I need to emulate it.  
Of coarse I want to use Remote Desktop Services Manager.  There are serveral step NOT COMPLICATED but too many.  The main users reviews the work of the other than send it out.  Every item is billable, they can process many items in quick succession.  The extra click just slow down the process and piss him off.

Any ideas?