Well you can use the blank skin and edit it with photoshop. I've made my attempts...
First you need to remove the white from the void available in all skin folders, with a special filter you can download. You do this so you can work with layers under the void so as not to affect the panel lines etc.
you could always make a copy of the void and edit that one and when you need the lines for the panels just put the original on top of the copy one and use the remove white filter. it works for me and well my attemps are pretty good.