 Note: This field MUST be defined 
 or the door will crash!
  This field will only be 
  acknowledged in REGISTERED versions
  You simply enter a MINIMUM security 
  level required to bypass this
   door. If you have a registered 
   version then anyone with a security
   level equal to or higher than this 
   level will be sent back to the BBS
   without even knowing
   that the door was there.
