sketchup IMPORT with layers?

 From:  rado
Sorry if this has already been answered. Searched the forum and couldn't find the info I needed.

I have a detailed architecture project that I used Moi to build. Is there a good way to import into sketchup with layers intact?

I tried OBJ but even with smoothing / joining geometry, the model still ends up a mess. I was hoping there was some better workflow or maybe some script out there that lets you export in skp format with layers intact.

If I missed something obvious sorry!