mstsc %1 /console
Now, you just have to drag-n-drop the rdp-files on the batfile and the connection will be made using the /console and you can access the computer. No cmd-hacking, no remembering the syntax... just drag-n-drop! You have to be a local administrator to connect using /console, but arn't you always?
To log out the old connections, open the task manager and select the tab users. Mark the users that do not have id=0 (thats the console connection) and select logoff.
Hope it is usefull!
CRM and SharePoint Consultant