Here are some instructions on how to use Remote Desktop to connect from a Linux PC outside the DUMC firewall to your BIAC Windows computer inside the PHI zone. If you are trying to do this from a Windows computer see Remote Desktop.
1) Connect to a BIAC Linux server in the biac.duke.edu network using SSH.
2) rdesktop -u username yourWindowsComputerName
Obviously this presupposes you have access to a BIAC Linux computer (step 1). If there is demand for this service we can probably arrange such a Linux comuter for general use.