Is it possible to replace my HTC Hero's screen with a bigger one?

Initially I wanted to replace the speaker, cause I started hear some crackling noise when I make calls, but then I started to wonder... would it be possible to connect another touchscreen digitizer and a 3.7" LCD display to the Hero and get it working properly?

And if it's possible, what about the resolution? I guess it's not hard coded, you can change it somewhere in a custom ROM...

If there is anyone with any insight, I'd appreciate the answer!