How to merge a georeferenced production with a non-georeferenced?

Hello,

I have a RM production .3mx file which is geo-referenced in UTM WGS84 system.

This represents the super structure of a highway bridge.

I also have another RM production .3mx file generated from photos of the sub-structure of the same bridge, which was captured using a DSLR camera without geo-reference.

Is is possible to merge these two productions using any product line from Bentley?

Tx

SRG