How to add Properties in WorkArea Type?

Hi

I need to add couple of "Properties" in the WorkArea Type. I checked the cmdlet "Import-PWRichProjectDefinitions" but help says it is not working correctly.

Is there any other way to accomplish it ? also i would like to know the cmdlet to create new WorkArea Type.

I'm using PWPS_DAB Version = 1.24.3.0.

Any suggestion would be helpful.