xemacs source code HOWTO ?

hi, a month ago i wanted to get into XEmacs' source code, to see if i could, if ever the oportunity showed up, participate in improving/debugging/testing xemacs . i wanted to add some lisp structures and builtin functions that might be appreciated, if not for all, at least for some. and so i got into the source code, and, as i haven't done C for quite a while, and Java brainwashed me quite well, i got very confused as to all the precompiler macros and the GC methods, as well as for the mapping between lisp and C objects. i mean, i could not find a place where i could learn how all this fit together, how i should declare new lisp structures, how and when to use GC related functions, and how to organize the code i would add. is there such a HOWTO, to introduce new programers, or did everyone that ever participated to emacs/xemacs just read the code and understood the whole project guidelines in a second and started coding the minute after ? hope this question is interresting. -- # Stef Epardaud, # There is no limit to the power of computing ... # Java Defeater # ... except men maybe ? # Earth # Lunatech Research, # Solar System # soon we will quit researching and start finding...