Solidworks to DWG envelopes on a different layer?

Hi,

Another question as I can't seem to find a post that list this surprisingly,  How can you map a assembly drawing with a envelope onto a Phantom layer as every way I have tried all puts all the geometry on the object layer. even if it is on a different layer on the SW drawing as well as being an envelope item.

Regards,

SolidworksImport export