When trying to use the Report Wizard in OpenOffice.org Base I get the following error message:
The wizard could not be run, because important files were not found.
Under 'Tools - Options - OpenOffice.org - Paths' click the 'Default' button to reset the paths to the original default settings.
Then run the wizard again.
Obviously the paths cannot be reset to defaults because of the PortableApps modifications. I guess this just has to be looked into and a patch released.