Default switching from aGPS -> Standalone, and back again

Hello, I've searched up and down trying to find a way to switch from aGPS mode to Standalone GPS mode without doing it all manually in the registry. Is there a way to create a program that will make the regedits? Or is there a program or something out there that does this already?

Around town aGPS is great, but I often go out to the desert to go riding and 9 time out of 10 there is no cell signal out there. When I get to these dead zones, I'd love to be able to switch back to standalone GPS for tracking purposes. And then once, on my way home, it would be great to be able to switch back to the aGPS mode...

Anything out there for this? Is is possible?