Default [Q] How to merge GIT with Rom.

I'm not a rom developer, but I've managed to setup a Cyanogenmod environment. Though, 4.4 Kit Kat is not currently a build I can get, and the only one out there is (that i have been using and love).

I want to merge a GIT with that rom to add Touch Sensitivity Increase, specifically this:

Is there a way to do this? Tutorials or other information? I've been looking for a bit, but it appears I need an un-compiled version of the rom to do this.