Additional graphic components can be added to existing parametric doors (or copies of existing doors) using Parametric Cell Studio.
Alternatively if the door sizes are fixed Compound Cells can be used, these are easier to modify for users who are not familiar with Parametric Cell Studio. See AECOsim Building Designer - Compound Cells - Non Parametric Doors for an example of this workflow.
Alternatively (unless they are needed for detailed plans or visualisation) these items can be specifiied non-graphically by schedule references using either existing DataGroup properties such as 'ID | Type ID' or by adding an appropriately named custom DataGroup property. AECOsim Building Designer - Compound Cells and Metadata shows an example of using Compound Cells and DataGroup metadata in a similar way.