Quote: "I question whether we can do a moving vehicle. that he was going, or to control it
"
there is a bike in the tgc-store that uses a HUD to simulate driving it. also now with v119 you may use the camera-/3rd-person commands to create something like that, but its still very complex to do.
Quote: "how to do a waypoint the vehicle "
search the model you want to use, give follow.fpi (people script) as mainscript and create the waypoints where you want it to follow.
Quote: "G clicking the player to fight with us."
you have to setup darkAI characters, friend-appearscript for fighting with you, enemy-appearscript to get your friend fight against them.
Quote: "How to make waterfall"
use the metro-theatre-pack-entities and decals/particle-decals.