Need Help: How to assign two keys to one function in traktor?

[Slamfacts]

I currently have an Axiom 25 I'm trying to map some functions for traktor.

I need to assign two keys to one control like this. The first key will function as a key control Ex: ( ch01.cc.000 + ch01.cc.001 ) But when I try to use the "Learn" to assign the two keys at the same time, only one is assigned. Ex: ( ch01.cc.000)

I do not know if this is possible whit a MIDI controller, but when I look at the "keyboard presset" there exist functions with two keys. Ex: (Shift + 1).

Thanks in advance.

[VanGogo]

A shift button is made by making it a modifier. Then when you assign the other button's function, with out the shift button pressed the modifier will = 0. Assign the other function to the same button, but the modifier will = 1.
Search the blog posts, as there was a more detailed explanation a while back.