The easiest way to do this is to create the catogories in Admin Control panel
- Ftp into your website,
- go to data/media folder
- put the images into the catogory number that matches the catogory number in ACP
- in ACP go into {Check new images}
-after all the pictures are loaded in, go to {Auto-Thumbnailer }
thats it
the pictures will take the name of the file