I am trying to find a way to delay execution of a command sent through Rcon.  I have found out how to allow players to spawn vehicles through server rewards by simply adding an rcon command to spawn these entities in exchange for RP points.  I'd like to add a delay to the spawn so people cant just fly away.  Do you know any way to implement a dalay in an rcon command or any conmands that implement a delay like this?

You'd simply intercept the command with the OnServerCommand hook, cancel the original, and then send a new after a timer has ran.