DarkRP Server Issues

Well I Have Numerous Issues With DarkRP 3.5.7

> When weapons are spawned from crates they arent able to be picked up
> Need to know how to install custom weapons
> How to create custom classes with the Permission to Set Agenda for a group (Mafia Leader :: Mafia Members)
> How to make players take damage from Guns (They Take damage from fall and stun sticks however if i stun them they only go down to 1% HP not 0%HP)
> How to install Admin Mods
> Command to change maps
> Script/Code to allow Vote Map Changes (!votemap no.)

I Will Reward you with Admin if you Live in Australia (As I dont want players with pings of 400 or so)