Rednet is geared more towards general communication, but yes it could work provided the turtle is already setup to execute whatever code it receives. A far better solution, which i have taken advantage of myself on occasion, is using one turtle to deploy other turtles then program them via a disk and a diskdrive. When a turtle/computer boots, it will run any file named "startup" on a connected diskdrive disk. You can use this file to setup whatever files you actually need on the turtle, then have the main turtle pick it back up and deploy another turtle using the same method.
Edit: On a second read i seem to have misunderstood the question partially haha, my bad. Though what i suggested is still ideal if you're gonna set up a large amount of turtles, which can then be controlled via rednet from somewhere else.
Edited by CometWolf, 19 December 2015 - 12:50 AM.