[REQUEST] How do you make a code cave?

[Errorjack]

I've found out that I'd better use code caves to do somethings if the value is dynamic or if the functions effects both people. Does anyone know how it's done and is willing to show me?

[actualmanx]

i also need this information i tried searching but found nothing to help me only
Basic Knowledge of Game Programming.
Understanding object oriented Programming in C/C++.
PPC Assembly.

well that means im not gonna be doing any code cave any time soon lol
gd luck with yours jack