AutoIT scheme?

I’m looking to find a scheme for the AutoIt scripting language. The one that is posted on the google site isn’t useful at all for AutoIt. All it has is a listing of all of the keywords, functions, macros etc. but nothing on code folding, syntax highlighting or anything needed for a real scheme. I have tried to modify other schemes to try and get one of them to substitute for the au3.scheme file with no success. I know that I’m clueless when it comes to playing with a scheme file because it’s not clear on the “how to add your own language” page as to what does what.

So, if anyone knows of a full fledged AutoIT scheme, I would be forever grateful to you for pointing me to it. Thank you all in advance, and most especially thank you Simon for your great program, I used to write my scripts in Notepad until I found this program and I can’t see how I ever did it that way before.