Unless you create your own ROM you will not be able to get rid of the actual binaries, though you may be able to install Opie on top of the underlying components. May, but it would be hard work, you\'ll need to get the opie source and then compile it all against the libs which the Sharp ROM uses.
I would be more inclined to just flash OZ. In truth the underlying parts of the system behave much the same (except that OZ is more up to date) so you wouldn\'t gain anything from your plan (other than keeping the flash ROM non-writable).
Si