Hi Theresa,
Currently you cannot assign arbitrary accelerator key (keyboard shortcuts) 
to a user-defined menu. One dull work-around is as follows if you really 
want to use keys on your keyboard: 
1) Define a macro like: 
  def qq {Menu -e 35045;};
 (Note: You can put this line in Macro.cnf in your program directory.)
2) Highlight cells, and enter qq in the Command window.
I will suggest to make the acceleration key definable for the custom menus 
to our developers.
--Hideo Fujii
OriginLab