I have an A2010.accdb/.accde that I use as a library, sort of. I just include it in references.
But the file type needs to be changed in the dialog box, because some other type is default
Also, if you wish to make an .accde out of it, your "library" must also be .accde, or else the stupid thing will not compile into .accde and just leave you guessing as to why not (cost me half a day to figure this out)
(and you can use an .accde as library for an .accdb).