Hacking keyboard shortcuts .kys file - single key shortcuts.

Hey there, 

Have googled quite a bit on this but doesn't seem its a thing. It bugs me that single key shortcuts are reserved for tools in Ps.

In almost all other apps like Maya, everything is open to set it to do whatever you want. eg. the X key for swapping fg and bg, is useless to me.

In another app I might assign that to save and close. I see how Ps is set up and the limitations... so that  X could only be used for tools.

Just wondering has anybody done any hacking of the .kys files or any other methods to bypass Adobe's limitations. In After Effects I manually edit

the shortcuts file and override the Adobe limitations on specific keys.

Are there any solutions out there ? AutoHotkey and remapping the keyboard, crosses a threshold where it becomes not worth it. 

Thanks for any pointers.

Alan.