Mapping Custom Properties - WPMD

I am trying to link custom properties to my WPDM part / assembly files.

I have created a description field inside my part / assembly custom property files and wish to link this to the Solidworks WPDM description.

I also wish to link the 'Number' to the actual file name.

I'm pretty sure this is possible but I can't figure it out!

Many thanks for the help

SolidworksWorkgroup Pdm