Download: click on the thumbnail image and download the image file to the folder of your choice. You can put it anywhere, or keep it with the other desktop pictures in System Folder -> Appearance -> Desktop Pictures

Install: Choose "Appearance" in your Control Panels. In the Appearance dialog box, select the Desktop tab, choose "Place Picture" and select the ptlogo.pct file that you just downloaded. Select "Center on Screen" for placement and choose your favorite background - ta da!

Download: click on the thumbnail image and unzip to the directory of your choice.

Install: Right mouse click on the desktop and choose properties from the menu. In the properties dialog box, select the background tab, use the "Browse" button to select the ptlogo.bmp file that you downloaded. Choose "Center" from the Display drop down list for placement and choose your favorite background pattern - ta da!