AS2 and AS3 files for Flash version MX and newer are located here.
For a better tutorial that goes more into detail on the advantages of using Flash for comics, *Balak01 has a couple Flash comics on the subject located here and here. I'd recommend checking them out! (just a warning: there is some foul language used in these)
I started this a few weeks ago when I released the engine itself, but school's been getting in the way. I decided to cut a bit of fanciness in favor of actually getting it done soon, so it still looks a bit rough at parts.
My last reply was incorrect. The easiest way to remove the black bar would be to take all the black parts in the "GUI Parts" symbol and set them to a color with an alpha transparency of 0, not to delete them. Full details are listed in the thread of my last reply.