It depends, are you trying to make it so when a person gets killed by the arrow the arrow gets stuck in them similar to TF2? If so that is possible, you can just spawn a static shape of the arrow from where it collided with the player.
If you want an arrow stuck on a player who is not idle, then as mentioned by Ephialtes and others it's not possible to choose the exact position where the arrow should mount. But, you could use the method I mentioned above to make a static shape "follow" a player for a few seconds (following a player forever is not going to happen without it being failed here and at RTB), even then majority of the userbase's computers will not be able to handle it. When you think of how some people host full 32 player servers, this is not an option.
Majority of Torque sucks to work with unless you have the engine code, get used to it.
