device cloak?

Not sure if this would be an App or a Hack but anyways.

is there a way to cloak my phone to make other Apps think im a different phone?

like i have a Droid2 and say i wanted it to be seen as a Incredible or a Fasinate. much like in browser you can go into debug mode and be seen as a desktop or a iphone.

there are specific apps out there that require a certain phone. not sure if its even possible but just would like it.