I threw this together today, it still has a bit of work left, but I felt it was worth the time to get a feel for it and I can make dimensioned plans right off the drawings fairly easily, (that is if I can remember how). I haven't used this program for about a year now and I am a little rustier than I thought I would be. If you are curious, the program I am using is called Inventor, it is made by Autodesk, the company that makes AutoCAD and 3DStudio Max.
The lettering on the sign will be a white if it gets built, I changed it to a light grey so it would show up a little better for your viewing pleasure. What you read on the sign is exactly how it reads in the picture, and this will be a very big sign as well, it will stand a scale 24' tall and 73' wide.