Not much else to do at this point.
Just add the event handlers for the AI menu items, and code the relevant values into them. The only vit that I would recommend is to use some sort of variance value when coding the OnUpdateXXX() handlers. This way when the user pick a custom AI level-of-effort that is in the neighbourhood of the program's idea of the level, the right menu item is checked. For example;
pCmdUI->SetCheck(abs(((CMuTorereApp*)AfxGetApp())->getAI() - CAILevel::LOW) < CAILevel::EPSILON ? 1 : 0);
I used CAILevel::EPSILON with the value of 3 to determine how close user chosen values had to be.
The registry stuff was much the same as that for the Poggle project. So go to this page to review.