To more directly answer the question as well Fred has not released KT's source under any licence. I'm not even certain if he will. However all of Tk102's & Cchagrin's tools are released under GPL. Even with the GPL release it would still be good form to contact these modders for permission since they are still active in the community.
Working so, we will learn history as a tree knows it; we will climb into shapes printed in the seed; we will become time made visible, years made fragrant; we will make of concentric memory a stem of praise; we will inhabit daylight at a trees own speed; we will be travelers who remain, patriots to this ground.
OMG I only rank 62.13018% geek or a Extreme Geek as it is referred to on the geektest at Geektest