Sorry guys but I encountered some technical difficulties while trying to install the 3.0 upgrade in my perfectly fine F700BT..... It did the the constant reboot thing. Is there a way to reinstall the previous firmware? No, I didn't back it up.

I would try to redo the 3.0 firmware again. Try using the FX 3.1 mod, that has been successful as far as I know. I also had the reboot problem after I installed the legit firware from Pioneer. After I installed the hacked version, all was good for my F700. I can explain why this happened, but that is not as important as how to fix it, so just install one of the hacked versions and you should be good to go.