[Help] Gellins Base V2

I'm pretty new to D3D coding, and only have a few simple menu's made, but now i wanted to make something more advanced, for combat arms, so i downloaded gellins source to start learning, however... i don't know where to even start, like where to add addrresses (that's what im used to, vs other's who i know of who don't use addresses), and so on.. also the code is really messy, and theres so much... so i was just wondering if some one could help me out... i dled whit's detours and that worked fine, but now i'm not to sure how to edit it... Thanks to any one who can help me.

Btw, big thanks to Whit, for those detours, helped a bunch.