[VBRichClient] Open a RS as readonly and then copy it to another RS and modify it

Let me try and explain.

I am extracting data from multiple tables using Joints. Obviously the returned RS is readonly.

Now I need to add a few more fields to the RS. But this is not possible.

So I will have to create a new RS in memory and then copy the contents from original RS to the new RS.

Is this the right way to do this or is there a more better and efficient way to achieve this?

All suggestions and help is highly appreciated.

TIA

Yogi Yang