Yes, he should be able to change his "favorites". It'll add the pre-loaded sounds to "favorites" in the order he selects them. I have hunted with a Turbo dogg for a few years now and it works. However, it's not a very tough unit. It didn't take the beating like I wanted. Also it's starting to break up if the volume gets above 40/100.
I'm looking at replacing it with a fox pro inferno.