Are you trying to get the client script to exec through the server or looking for a way to do it through the server?
The way I came up with yesterday works as follows:
When a player connects, or finishes all the loading the server tells the client to create a new .cs file, write a line into it (the function that changes the player's aim), close it and execute it. It should work fine. I don't know why it doesn't work properly when a client joins (or finishes loading).
I also tried to call the function that tells the client to create/execute the script manually. Nothing.
Poll