AMS: there is nothing in the rom update that requires the iyonix, prior to unpacking the final delivered zip. do what you need for this on any machine, put the delivered zip on e.g. a cd, and take to iyonix. unpack the zip there and continue.
BTW if requested we can supply backups of the current disc image (which includes, obvioously, any stuff that the updater has had for delivery). There is a small charge for this, but would be happy to bring it to the show as a result of an order.. sales or jwb address please