Rebind X key in pip-boy

[DanForge]

I use a steelseries gaming keyboard and it has a seperate section which is specifically meant for gaming where the keys are all arranged a certain way. This is great and I find it very easy to use. Unfortunately there is no X key, so whenever I open the weapon mod menu I have to reach across my keyboard and blah blah blah. Same goes for exiting menus.

 

So I'm asking if there's a way to rebind the X key to, say, the P key. I haven't been able to figure it out even after looking at the falloutprefs.ini.

 

Any help would be much appreciated.