@ NightAngel -
I was playing around with the original background on that wall to see if I could use it at tablet size, and I think I got it looking pretty good. As I said in my previous post, the rest was easy. So I just went ahead and completed it at the size I believe should be correct. Let me know how it goes.
Preview ↓ - Do not save
To save at full 1920x1408 resolution - Follow the link bellow and long press the image on your tablet until the save option pops up, Then find it in your photo gallery and set as wallpaper. If it looks fuzzy, you may be better off viewing it from a computer, right click and "save as", and finally transferring to the tablet via USB or email.
Link to full sized version ↓