special characters in keyboard customizer

[EatMorGlue]

In IBM's keyboard customizer, is there a way to add/program special characters other than the default commerce and scientific characters they have?

I want to have an easy way to access the long dash (Alt + 0151), and the added steps (shift/num lock) to use the numberpad seems cumbersome after getting used to desktop keyboards.

Just got my first laptop (a T42) Monday, and this is the only "fault" I really find in it.