To create an account, simply type 'cr {username} {password}'. To log in thereafter, type 'co {username} {password}'. To log in as a guest, type 'co guest'. Guests can only navigate public rooms and read messages, and cannot enter messages nor build rooms. Finally, you can always type 'help'
You can also connect the traditional way, through a telnet program. Linux and Mac OS has them built-in; go to a command line and type 'telnet bbs.coldwinterknights.net 8888'. Windows users may download PuTTY, a very well-known telnet and SSH client. If you are getting an error message in the above portal (e.g., 'for security reasons etc. etc. etc') an external program will be your only option.