What you can do is. get the Flashtool setup to flash, and while your phone is in mid loop, (when the screen is blank) plug in your phone in flash mode. I got stuck in a boot loop on my first flash attempt too, and thats how I got out.
If you don't want to root your phone, flashing is a lot simpler than it reads out to be.
the main thing is to make sure your PC has all the drivers installed.
What I did was
Flashed the.111 firmware wipe everything, nothing excluded. restarted the phone, I didn't bother setting anything up. shut the phone down, flashed ICS, with exclude baseband checked, then I was good to go. I did have to manually set up my APN, and some others had their phone automaticly do it. not sure why that is.... Hope it works out for ya!