I haven't seen the movie but I did watch the documentary "Overnight" which follows the writer on a nightmarish ride. It was tough to watch but interesting to see what happened. Basically the documentary is a bunch of raw footage his friends shot and put together. It has all the behind the scenes stuff.
"OVERNIGHT begins as the classic Cinderella story when Boston-bred bartender and budding filmmaker Troy Duffy sells his screenplay, ?The Boondock Saints,? to Harvey Weinstein of Miramax Films. A bidding war gets Duffy much more than a hefty check; it also gets him the right to direct the film plus a deal for his band to produce and perform its soundtrack. Then, in a gesture straight out of a fairy tale, Weinstein offers to buy Duffy the very bar in which he works, turning the young man and his yet-to-be-made movie into overnight sensations.
Buoyed by his prospects, Duffy allows his then-colleagues Smith and Montana to document his conquest of Hollywood but, from their uniquely intimate perspective, what they captured was quite the opposite: following several months of restless development and reckless missteps, Duffy slides from A-List to blacklist. Calls go un-returned, his film is dropped by Miramax, is revived by a minor company at half its original budget, then ultimately consigned to the video bins. Midnight comes for Cinderella?"
http://www.rottentomatoes.com/m/overnight/about.php