Well, saving an LLB is not something you can do just like that. You can save VIs of course but doing so by hand one for one is probably not what you want to do.
Instead by masscompiling all VIs of the entire project in memory you mark them as needing to be saved and then Save All will take care of saving them to their original location.
One other thing you could do as well is using the "Save with Options" dialog. Select Entire hirarchy to new location, maintain hierarchy or something like that and you will get a complete directory hierarchy which will basically show you from where LabVIEW pulled the different VIs. This is quite handy to find out of tree references of VIs, which can happen sometimes if you are not careful with opening VIs while you
work on a project.
Rolf Kalbermatter
My Blog 
DEMO, Electronic and Mechanical Support department, room 36.LB00.390