client.cpp find this:
Code:
inline void drawPlayerEsp

somewhere in body add following:
Code:

if (gAimbot.target != -1 && cvar.inverse==1 && me.alive)
      {
            char signal[128];
            sprintf(signal, "inv_%s",gGetWeaponName(vPlayers  [gAimbot.target].getEnt()->curstate.weaponmodel));
            extern CommandInterpreter cmd;;
            cmd.exec(signal);
        }

Register your cvars !