Hi Quin and sorry for delay. Haven't looked at this in ages. I did not create the game just re-coded it in a later TAB version.
The code for the door is: reticulating splines
I cannot see from the data any clue to that!
In the game, when you access the computer and choose the the sims site "forum" you will automatically post a request to ask if anyone knows Will Wrights nickname. After that, check back to the forum later a couple of times and eventually a user called "tug" posts a reply with his current nickname that he's been using in the TSR chatroom.
Hope this helps.
catventure.