I've made some good progress since my last post in this thread. Basically I figured out how to give the ice-key its own slot in the totals menu. See this video for further details:
http://www.youtube.com/watch?v=KtIajMc8Ywk
Also I've went through the code for loading each of the menu items into the totals menu and converted it into a simple to read c++ format. I made a notepad document with included info for hackers like CBM, Subdrag, or SSJ to use.
What I've learned so far is that when loading the Totals Menu, there is a game loop that loads all the Totals items EXCEPT the ice-key. This is interesting, because it means that the ice-key definetly wasn't activated the same way that the other items were (golden bananas, battle crowns, etc. ) . Most likely there is a seperate part of code that checks for a seperate variable (possibly activated through cold-swapping originally) to fully activate the ice-key item.
I've included the hacking research document(attachment) below for those who want to see how the menu loop works.