0Grapher: Where does it show up? In the game or in the installer?
It sounds a lot like the ToddTest hall which you can reach via the console and that essentially is cheating.
When installing the patch did you only apply the default changes or did you check any additional boxes?
It also could be an alternate start functionality but that is not included in the Code Patch.
tinyE: It is the Code Patch but I don't see a check box for anything called theToddTest.
And it shows up as soon as I enter the 1st area after registering; it's basically a door in the ground.
Ah, I think I remember. The Code Patch comes with an ESP, I think.
You can
ignore that. It would be best if you simply deleted it. The patch itself is just an EXE which should be executed in your game folder and this ESP is just for testing purposes. :)
Edit: I just checked and it seems that I'm right. You can leave the ESP active if you are not bothered by the trap door.
There is a Morrowind Code Patch Showcase mod installed in your Data Files folder. This is optional and for explaining and trying out MCP features only. Enable it, start a new game and head through the trap door that appears outside the office in Seyda Neen. You will get a demonstration of most of the features of this patch by courtesy of Psyringe. Compare it to how normal, unpatched Morrowind works with the same mod.