SBS 2003 Terminal server licenses OR Remote Desktop?

Hi:
  I have not used terminal services since WIndows 2000 and when I did, the licenses were already insalled and the server was already configured.  
Currently, I have a SBS 2003 in need of multiple end-users requiring to access it in order to run Quickbooks Enterprise from their home offices.  The SBS 2003 server resides at a main office site.  I understand that by default, Server 2003 and SBS 2003 offer only 2 Remote simultaneious Desktop connections.  However, I need to be able to allow multiple users "remote access" with "user" permissions only to the server's desktop to be able to run QuickBooks Enterprise.
Can someone provide me with the proven steps that will allow more than two simultaneous connections to the server?
Here is what I have attempted thusfar:
When I log into the SBs 2003 server, I perform the following but get nowhere:
1.   Start/All Programs/Admin Tools/Term Serv Licensing.  But, all I see is "All Servers" w/out a + sign to activate the server because there is nothing to expand.  So, I attempted to connect to the local server but cannot hence, I cannot activate and therefore cannot add licenses.  
(QuickBooks Enterprise is loaded and working fine as long as no more than two simultaneous users attempt to connect to the SBS 2003 server.)

If you can provide me with information that will assist me in achieving the goal of allowing multiple users direct "user" permission access to the server's desktop console from a remote location in order to use QuickBooks Enterprise, I'd appreciate your feedback tremendously. Thank you in advance.