I have windows vista, and I have tried Z-mod but, well, i could never figure it out...

. I would like to know a couple things if you could please help. I have Fenix mod and fpsc 1.16
1: How do you make it so you can only carry two weapons?
2: How do you make it so zombies can break down barriers and climb in? (Please don't just say z-mod i know you can do it in z-mod i just don't know how)
3: I could also never figure out the money system in Z-mod like how do you make it so you can see how much money you have and so you have to buy weapons/open doors with money and stuff.
PLEASE HELP ME!!!
SUP