Wizard table and add action

Hi.

I have a constructing wizard problem.

I need add a collection of persistable objects (that are exist already) to document creation wizard.

I suppose to create a table (at a certain wizard step) to fill it with several objects by add action.

How can i bind add action with table data list? And how can i get this collection of added objects in wizard controller (processor) to link it with my created document?

Any useful links to customization guide or help center are welcome.

Thanks.