I have details about creation right in the description. The original maker of the actual MegaText script used to have it on this site. I assume they've either updated it or taken it down by now. Since the script is over 2 years old, there is no way for me to link to it/provide exact ownership details.
If the person that did make it messages me with proof I'd be more than willing to update it.
The colours were added by me - therefore the original makers of the "base" script wouldn't be able to post this script.