1. Select your pictures you want use,  I would suggest copying and renaming the files.  For example, I named my 6 jpg files cube1.jpg, cube2.jpg, etc . 2. Go to: http://www.dseffects.com/applets/DS_CubeMap/DS_CubeMap.html  and click on the link to 'Download DS Cube Map'.  This is a zip file you will need to download and unzip 3. From the same web site, click on the link for the 'HTML Code Generator' 4. Fill in the form as desired, and after generating the HTML code, copy & paste it into a 'Build your own Web Gem'.  Additionally, you will need to modify slightly the very first line of code. 5. Before closing the Web Gem, click on 'Files for this gem' and insert (add) your 6 .jpg or .gif files, plus the .class file (DS_CubeMap.class) 6. Save, publish and enjoy!