I was trying to get my GB F20 to communicate with my new computer (Vista), with little luck. I couldn't install v2.0.2 of GBroom, so I downloaded GB v3, but still could only see my GBF20 as a HDD. GBRoom wouldn't spot it.
Anyway, I messed about and deleted some files by mistake that were crucial, and ended up with the message "No system found on HDD".
I googled in despair. I tried to install version 3 of the firmware but got the message "cannot update".
I then found your site and tried to install Rockbox. I followed the instructions on this thread (http://forums.rockbox.org/index.php?topic=8927.15
), and have now ended up with
"Rockbox error: -2"
This is far worse! The computer won't even recognise the GBF20 as a HDD, so I can't access it!!!
Please help me out of this hole!