Hmmm... working from that poster isn't going to yield very good results at all. You would need to find artwork this is larger than your marquee in order to get good results. Either that or find the Frankstein logo as vector art. Not sure how likely that is.
Otherwise I would absolutely recommend working from a font and not an image for the "FrankMame" word. I searched for the authentic Frankenstein font, but I couldn't find it. Here are a few alternatives...