I believe you could make your own thumbnails easily by watching the steps (five I think) that PSE employs as it creates a contact sheet for a folder. Jot down the steps as they are quickly displayed in the history pallette and duplicate these steps on whatever pic you want (if for some reason you don't want to use the macro of PSE's Contact Sheet).
As Bob says, PSE has a thumbnail maker built in at File>Automate>Contact Sheet 11. You; browse to the folder containing the files you want in thumbnail form, have the option to use your already existing file names, choose the size of type for the file name and choose the number of thumbnails per page. The number of images per page is inversely proportional to the size of the ThNail. Each image will be opened automatically and placed as a thumbnail on a new document, one by one. You can then store and/or print the page(s).
Nancy
Rich
When you see a preview in the Open menu, you are seeing a thumbnail image which something had to create. Those you see have had one created. Those you don't haven't. Open any TIFF in Elements and Save it, and you should now have a preview image. Note in your Save menu the bottom left corner has a check mark on "Thumbnail" on some formats (TIF, JPG, PSD, etc.) and some don't (GIF, BMP, PCX, etc.).
Bob
Your not scannin' those cartoons as GIF's are you...
Garth