This is a very simple program, but also very useful. It uses Rick Grevelle's TDIR program to extend the menu system of the 48. Rick's TDIR program lets you define custom menus with sub menus in them (just like when you press the MATH key, you get a bunch of sub-menus to pick).
MSU uses (and includes) Rick Grevelle's TDIR program to extend the menu system of the HP 48. Rick's TDI program lets you define custom menus with sub menus in them.