How to restructure the wordpress admin menus for multisite

I am wondering how to best go about creating a plugin to restructure the wordpress admin menus, as I am developing a wp multisite with buddypress, bbpress and marketpress and would like to reorganise content into more specific areas.

I know I have to create an admin plugin and probably set it into the mu plugins directory. The only thing is I cant find any tutorials or any solid easy to understand information on how to attack it.

Any information to point me in the right direction would be greatly appreciated!