How to add an additional column to a web dynpro table without upsetting the context?

Hiya,

I have a  Z table that I have used as a basis for creating the context in my web Dynpro.

The context is then used as the binding for a Web Dynpro table.

I now would like to add an additional column to the table - to hopefully display a pretty icon, if another column contains a tick in a checkbox.

I thought I'd simply add an additional attribute to the context and then bind that as a column to the table...

However because I have bound the context to a Z table (see above) I can't add any more attributes to the context:

I need to keep the context bound to the Z table as that is how quantities, currencies and the positions of decimals are determined.

Is there any way I can add an additonal column to by table?

Thanks in advance for any ideas.