why not just activate the enterprize version and not go buy the ultimate.
ultimate are expensive and it does not have any fetures that you would need.
i am a little confused about your last post. "mom told me that you cant change it".. change what?
the motherboard and harddisk?
i don't know if you can use the upgrade option with win7 ultimate on another windows 7 install.
it's meant to be upgrade on vista.