Hi,
First off to create any sort of digital art you are going to need the programs to do so. Mountain included both an .eps and an .ai file in his zip. The EPS file will be able to be edited in Adobe Photoshop or Illustrator, and the .ai is strictly Illustrator. Now of course both of these programs cost money so if you don't already own them I would recommend asking around for a little design work from someone on the forums. I would be glad to help but i have zero free time.
If you would like to take a crack at it there are a few free illustration programs that you could design your marquee with, such as Gimp, Open Canvas or Artrage.
Sorry I'm in a rush but I tried to answer as best as I could.