Just a guess, but you could hook it up to the PC and setup ActiveSync. Then run the "ActiveSync Remote Display" power tool to use the mouse to control it. My guess is that this will get you past the calibration screen, but there is a chance that it won't work. "True Connect" is similar and might work as well.
Worst case, you should be able to get some debug utils for ActiveSync that let you kill remote processes on the device. You could use that to kill the calibration screen, but I'd bet it will reappear on the next boot. You might also need the full Visual Studio development environment to do this, which might not be an option for you.
WRT replacing screens, I believe there are three different screens found on the Blue Angel, and one of them is incompatible with the others. This is from memory, so don't take it as gospel. With screens from another device altogether, it's a maybe but you'd need to be a lucky person to get away with it!