To update the appearance of reports in the various preview screens throughout the workstation, take a look at the ReportPreview() function in trunk/Ris/web/js/preview.js; from there you'll be able to customize the generated html to your liking.
If instead you're interested in replacing the simple text box control in the reporting component with a form-like control, you'll need to create a plugin that contains:
1. A class that extends the ReportingEditorProviderExtensionPoint (and implements IReportEditorProvider)
2. An application component that implements IReportEditor.
Then, modify preview.js as noted above to render the report data saved by your custom plugin.