Hi Nikita, there is an object library plug-in that is part of Max Smirnov's CustomUI mod.

The information on how to install it is here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=6507.268

and I've attached the files here for the v4 version (which also works with v5) since Max's file repository is offline and I have not got the mirror of it set up yet.


The next v5 beta will enable writing thumbnail images to .3dm files and also include shell extensions so the operating system will be able to display thumbnail images in regular system file browsing UI. Once that is in place you will be able to get this object library functionality just with the regular Import or ImportPart commands.

- Michael