Did you know you can open up your picture tube folder found in Program Files under Jasc Software? If you open the picture tube folder, you can drag the tube you want down to your PSP that you already have open in your tray.Or you can just double click on the tube file and it will open in psp.
Opening the multiple tube that way, you will see all the choices displayed at once and you can use the selection tool to select, then copy the one you want.