Some things people don't seem to understand...
I first heard about this film when I saw the trailer at the end of Liquid Sky. While I agree that it is flawed, there seem to be a few points that people are missing...
*SPOILERS*
first of all, people seem confused about where Eric got all his money. "Aunt" Stella was actually his mother, and after she died, he collected the insurance money.
also, Eric did not win the heart of the Marilyn Monroe lookalike by telling her she looked like Marilyn Monroe. He never once said to her, "You look just like Marilyn Monroe." In his twisted mind, she WAS Marilyn Monroe, and began speaking to her as if she truly were. That, along with his movie trivia knowledge, and unusual demeanor, is what charmed her. He was unlike anyone she had met, and while she probably would have gotten annoyed with him after a while, it's easy to see how a beautiful girl could fall for a sweet and unique little geek.
This was just my impression, but I assumed that the "Alabama and the 40 Thieves" bit was a product of Eric's warped imagination. He saw the guy talking about it on TV, and created the scene in the car in his mind. Since the film is told from Eric's perspective, we see it happening before the TV appearance, where Eric placed it in his memory.