well I am no expert on actual code, but, given your question here few basic things you need to know:
First of all you need to know how to code in C++. (or find someone who does)
If you got this part covered, then you need to donwload the source code on the google project for Emu here:
http://code.google.com/p/projecteqemu/downloads/list
Then find where skills are handled, and recode them to whatever you like.
Where excatly are they coded - I don't know. You can try to look yourself, or perhaps one of the devs could point you to the right place.