I have attached the zip file containing the .PSD template file that Decalgirl sent me for a custom Kindle 2 skin; they still don't have the template file up in their forums. From their "What To Do With These Files" post in the templates forum:
These files are meant for you to create your own artwork, then send it in to us to have a high-quality, custom skin made using the design you've created. They're not intended or meant for any other purpose.
Once you create a design, flatten the image (Photoshop versions) with the cut line turned off. Zip and email to the file to firstname.lastname@example.org so that we can review the image to make sure there are no issues (copyrights, proper resolution, etc) and one of our representatives will then email you a link with ordering instructions.
There are three layers in the .PSD file, 'Art', 'Mask', and 'Overlay'; put your graphics either on the 'Art' layer, or on a layer between 'Art' and 'Mask'. There should be none of the 'Art' layer's color showing inside the cutout of the 'Mask' layer. The 'Overlay' layer is there so you can see where the cuts will go so you can position your graphics better; when you are satisfied with the result, hide the 'Overlay' layer and flatten the image to a single layer.