RDP Console / Admin Session
Yes. Use the /admin switch now.
/console is ignored on newer versions of RDP. /admin is ignored on older versions.
So you can use:
mstsc /admin /console .....
From http://technet.microsoft.com/en-us/library/cc753380.aspx:
"If the RD Session Host role service is not installed on the computer, a connection can only allow a maximum of two simultaneous remote connections to the computer."
The console session doesn't matter, you can't have more than two connections without proper licensing.