Menu loading new user and current user

I'm looking at the 2004 menu structure and need some added insight to the
way menus work.
So far from what I see the below is where the default menus are stored and
where I need some insight. Also is this written up somewhere?

** C:\Documents and Settings\dave\Application Data\Autodesk\AutoCAD
Mechanical 2004\R16.0\enu\Support

Copies of the files from I think the data cache to the users application
area.
If I load a new menu system how do I force this to load a new menu here
or do I need to replace it manually. If I do it manually what about the
future. For example if the user changes his/her menu of if I change the
master menu.

** C:\Program Files\Autodesk\Acadm 2004\backup

Acad menus with source and no Express tools.
What is this directory for?

** C:\Program Files\Autodesk\Acadm 2004\UserDataCache\Support

This directory has the default Express tools with source and acad menus
with out the source.

If I want to load a custom menu and profile they should go ?? into the
user data cache?

 

You will find the following are where menus are located with R2004:

C:\Documents and Settings\<user name>\Application Data\Autodesk\
Autocad 2004\R16.0\enu\Support\
C:\Program Files\R2004\UserDataCache\Support\
C:\Program Files\R2004\Express

 

I'm sorry what I'm looking for is how these files are used.
Also I have the directories I listed not the R2004 dir.

Thanks
Dave

 

My understanding is they are loaded from UserDataCache but when I modify
any, I change them ALL.