The easiest thing to do here is to override the ProcessCmd method and insert your override logic.  This is something that we commonly do to add hotkey functionality...and this is the root level so it will trump anything else.

This is a method on any control, so you could either inherit the MaintenanceFormToolstrip and add it there...or if this is more of a one time thing then you could just do it in the form.  In either case, the code would be the same:

Is there a way that I could setup a hotkey so that when a user presses ALT-N? Like a hotkey I could bind to the New button on the MaintenanceToolstrip?