Upgrading firmware over the multiregion hack is a common problem, and as far as I know for the moment has no workaround. That`s why I always recommend never multihacking Philips machines but using a cheap player instead for multiregion.
I`ll keep my ear to the ground and if I hear anything I`ll post it on this thread.
J Mark Oates
I have an open mind - everything goes in one ear and out the other.