1- Don't think it will ever be possible.
2- There's a way, seen it somewhere (Google is your friend) just remember messing with partitions is a very very risky business
Ah, that's a shame. Saw on one of the other multi-boot threads (unfortunately not for my phone) that they were going to look into it as they had managed to install them to USB via OTG, but it is done differently to this way so wasn't sure if it could be implemented.
I have been looking into it but unfortunately it seems phone specific from what I can tell. It's been done on the Galaxy SII so I'm hoping someone over there will be able to help me figure it out.
Cheers for getting back to me anyway.