First of all, you will want to get an account on an SP2 machine. Once you have that account, you can access the machine by typing telnet SP2machine_name.
If you are working on an X-Windows terminal and wish to create new windows or open X-Window based tools on your workstation, type xhost + in a window on your workstation. Then, once you are logged in to the SP2 machine, you will want to set your environment DISPLAY variable by typing
(There are also other important environment variables which may need to be set. These will be discussed later in this document.)
setenv DISPLAY workstation_name:0.0