Touch screen doesnt work

[lip]

Hi,
My screen died on my touch. It's still under warranty but I've got a hacked ROM on it (it's also a work phone no less!).
Is there a way to reflash back to the BELL ROM without having to physically touch the screen as the screen is not working.

My ROM that I have (I can't even get the version because I can't navigate) was to go from the basic ROM to GPS(alltell custom I think). I remember reading that to go to a standard ROM it will be a problem or perhaps that was only to go back to the non gps version? Regardless, I need to know if I can reflash the ROM without touching the screen.

Any suggestions? Am I going to get screwed with warranty because it's a hacked ROM even though it has nothing to do with the screen?

Thanks.
LIP