So you wish to embed OBJ models in your plugin, so that your users did not need to download separatelly a plugin and a library of furniture. In my opinion you can either:

- use aformentioned classes,
- copy furniture library to a folder from which SH3D loads them

the first way gives you models immediatelly, but they disappear after startup. The second way is persistent, but models will be visible after restarting the application.

Hope I helped