Double click on a file, and admire what your hard work has accomplished thus far. These models contain Characters, Monsters, Levels, Props, Vehicles and Weapons. Now you will see a new folder, 'discimg_files', click on the little '+' icon again and click on the folder titled 'models'. Once all the files have been exported, close the popup window and click on the little '+' icon next the 'USRDIR' folder on the left. This will extract all the files from the archive.
From there you will want to right click on it and select 'export'.
Open up Noesis and navigate to the directory where you extracted your iso and find a file called 'discimg.pkg' in \PSP_GAME\USRDIR.