I was wondering if there's a way to add 2 functions to it (xv6700). By that I mean press and hold and single press?

It already does that. Press and hold brings up the camera app, and press is the shutter

I think what Raven is looking for is a way to assign a single press to launch a program. Unfortunately I don't know of any way to do this.

So every time you take a picture that app would load.

That's probably why you can't assign it, huh.

AE Button Plus. Its a program that allows u to add a single press, double press, triple press, and press and hold function to any hardware button. AMAZING PROGRAM. Free trial here: http://www.pocketgear.com/software_detail.asp?id=21070

You can also push the action button (joystick in) to take a picture. Huh