When i mentioned remastersys,
understood, if you do put an rescue iso together I have a script called grub-doctor from the saline dev that would be worth adding, it must only be run from a live cd.
it's possible to edit the second window that pops up when a backup session is started. You can
define the UUID and Label there

You have confirmed that it's possible to customize those values when you do a restore, that's good news, I'll give it a go later.
Would it be worthwhile to auto backup the target partitions drive MBR and then a yes/no to restore the MBR when you do a restore?
A feature in macrium that I used a lot was that when you made a backup it created a definition file in a folder in a central location, so that folder contained all the backup profiles you had used so you just picked one and off it went.
When you right click a profile one of the options is to create a desktop shortcut to autorun that profile in the background.
When I put a windows machine together for someone I always do this so with 2 clicks on an icon and no decisions/screens to go through they have a date stamped backup.
I would think it simple for fsarchiver to create a .desktop screen launcher to do the same as you just pass parameters to the qt4-fsarchiver I think.
Small suggestion about the filenames of the backups created, it would be better if the date stamp at the end of the file name was in YYYY-MM-DD-HH-mm format instead of saline-ssd-19-12-2011.fsa which is DD-MM-YYYY which don't sort very well in thunar.
You could also use the OS name or UUID/Label for the start of the file name and use that as the default file name
Better to use "YYYY-MM-DD-HH-mm-user note" it sorts better if you date stamp first part of file name even when the user changes their bit.
I do think that to be able to easily backup partitions is an essential app on any system and a qt4-fsarchiver.iso would mean windows users can backup their machines. so a simple, intuitive gui is very important, if it's simple folk use it.

I'm rambling on, sorry
