IOs7 beta 2 crash on iPhone 4s

My iPhone 4S was running iOS beta 1 (non developer), and today i got a notification that beta 2 is available to download and install. At this point i foolishly tapped the Install now button on my screen and now my phone is stuck in a loop, where i cant seem to do anything about it. The screen shows the apple logo along with the new redesignd line showing instalation progress below the logo - the line comes to about 10%, then it stops for a few minutes, shuts down and in a few seconds it starts again with the logo and the line building up from scratch to about 10%... its completley stuck in a loop, and i cant stop it. I tried to put my phone in to DFU, but all i am able to do is shut it down - if i turn it on again, the whole process begins again as described above. I even tried to put it in DFU while connected to iTunes, but iTunes doesnt even recognize any device being plugged in... Does anyone have a clue what to do? i am desperate, my phone is completley inoperable and useless.... Thanks for help!