Yea I know the feeling of hearing "i told you so!!"

Ok so what you are going to want to do is follow this link:
Unbrick Motorola Droid Bionic With RSD Lite 5.5 [Guide]There are 3 files that you are going to want to download from this page. In step 1 of the instructions it says to enter fastboot recovery by turning the phone off and then pressing the volume up and power button at the same time. What you are actually going to want to do is press and hold the volume down button and the power button. Other than that follow the directions on that page and you should be good to go. If it doesn't flash the first time just keep trying. Plug it into a different usb port (preferably a back one...don't know why but it works!) Try a different usb cable etc etc.
Just be sure to make a backup of all of your files in the internal storage because it may wipe all of your user data! Also the video on the page is very useful! It helped me out alot
As far as rooting the phone after you update to .902 it's really easy! (Thank you devs for the hard work!!) Just download this file, extract it, and run the batch file (labeled "run" I believe) It'll be called 'motofail'
[FONT='Helvetica Neue', helvetica, Arial, sans-serif]
http://vulnfactory.org/public/motofail_windows.zip[/FONT]
After you run that file it'll open up a command prompt window. All you have to do is turn usb debugging on and plug your phone into the usb and press enter.
To turn Usb debugging: From the home screen touch the menu button (Four squares to the left of the home button) then press settings. Go into 'Applications' and press 'Development' and check USB debugging.
Hope this helps! Remember to make backups of your files!! Also no one can be held liable except yourself if something goes wrong or you mess up your phone...but someone is always out there to help!!
