These images are saved in a standard 800X600 desktop resolution but they seem to work fine with a 1024X768 setting as well.  

Instructions for Windows users:

1) Click on an image below.  The image should open in a new window.

2) Once open, right click the image and select "Set as Background"

3) Enjoy

Instructions for Mac users:

1) Buy or build a Windows based PC.

2) Refer to Windows instructions above.