How do you do a fresh install?
If you PM your email address to me, I'll set up access to my virgin 2.0 files, you download them and copy them to a 2Gb SD card, and also get the testmode files from my online backup. Unzip the testmode file and put the two files from there on the root of the SD card.
Put the SD card in your unit, then turn the car ignition on (but don't start it) you'll get a screen that says copying files.
Once that's done either hit ok or the X in the top right corner. then it's start, programs, windows explorer go to "my flash disk" then do start, programs, windows explorer again and select the SD card. then select all the files except the two from the test mode file and select copy. then change to the "my flash disk" and edit paste, click yes to all.
once it's done. eject the SD card and turn the ignition off. wait until the unit shuts down completely, then either turn on the ignition or start the car.
First time after doing that the unit will take a decent bit longer than normal to start, be patient...
After that you should be back to normal and working.