Inserting Mr SID imagery into a Bricscad drawing

In Bricscad, there does not appear to be a way to directly attach a Mr SID image directly into the drawing.  At best, you would have to export the Mr SID file to a tiff or jpeg first, then attach it to the drawing.  The problem with this is that the file size of the tiff can become huge if you want to preserve the fine detail from the Mr SID file.

 

Does anyone know of any plugins/addons for Bricscad that allow it to directly handle Mr SID files?