They can definitely be edited, using photoshop. I just did this real quick. They are obviously far from perfect, but they do function. I tested them for one hand at play money.
I would be glad to walk you through the process I used to create them. I would even be willing to share the 2 PSD files I made, so you would have a point of reference. I used a very crude method, to just put a layer of yellow in there. It could obviously be much more refined, if someone took the time.
Do you have MSN? If so PM me your ID and I can walk u through it, and send u the files. If not, I could try and detail the process here or in a PM.
* Exceeded my monthly PhotoBucket Bandwidth limits.
Now I know its time to take a break from mods.
Imageshack to the rescue