Hello forum, this is probably a dumb question but I haven't managed to get an answer through googling so please bear with me.

Are there any documents, manuals, whatever that explain how to go about hacking the APM code? I 've been meaning to play around with it for a while but I can't find supporting documents and I 'm a bit scared of trying head on to read the raw source code and try making changes based on what my understanding of it is.

Can you please point me in the right direction?

Thanks.