Currently Being ModeratedFeb 17, 2012 12:41 PM (in response to Jeffrey Ellis)
moved and added partition number and table entries to provide Lion Recovery most likely.
Putting Lion on external drive is / was easy enogh and then clone back or use Setup Assistant would avoid that.
Not sure what you need to edit, something like BCDedit for Windows.
Upgrade is not, especially when you have XP or Ubuntu (let alone both).