So it is just that simple? Great! I will give it a try soon.

I expect it to be a little bit more difficult with my device though, as I think I changed the partitions sizes on the faulty N900 to increase the space available for apps. Maybe I've done some other tweaks that may not be saved with Backupmenu... And I do not remember any of the procedures. I will have to spend some time on the forums to figure it out I guess.