From beginning to end. Tempest19 from SHH was able to get the Spidey 3 book pretty early, and was nice enough to post scans of the pages of the book (for the final battle) and pics and summaries of what happens in the movie. Therefore, all of this info - 100% true.
ACT 1
http://www.superherohype.com/forums/showpost.php?p=11378014&postcount=4
http://www.superherohype.com/forums/showpost.php?p=11378032&postcount=7
http://www.superherohype.com/forums/showpost.php?p=11378044&postcount=8
ACT 2
http://www.superherohype.com/forums/showpost.php?p=11381130&postcount=195
http://www.superherohype.com/forums/showpost.php?p=11381142&postcount=196
http://www.superherohype.com/forums/showpost.php?p=11381160&postcount=197
ACT 3
http://www.superherohype.com/forums/showpost.php?p=11386870&postcount=610
http://www.superherohype.com/forums/showpost.php?p=11386936&postcount=620
http://www.superherohype.com/forums/showpost.php?p=11386969&postcount=627
http://www.superherohype.com/forums/showpost.php?p=11387011&postcount=634
ACT 4
http://www.superherohype.com/forums/showpost.php?p=11387777&postcount=724
http://www.superherohype.com/forums/showpost.php?p=11387785&postcount=726
http://www.superherohype.com/forums/showpost.php?p=11387790&postcount=728
http://www.superherohype.com/forums/showpost.php?p=11387794&postcount=729
http://www.superherohype.com/forums/showpost.php?p=11387808&postcount=730
I can say that I was skeptical of the movie at first. I read the X-Men 3 script a couple of years ago and knew it was going to suck since then. The movie was released in theatres one year later and sucked, just like I thought it would. I had the same fears for this movie, but after reading this information, I can say that I'm more than convinced....that this is the best of the 3. I'm loving the writing, action scenes, but I LOVE the characterization the most. The backstory of Flint Marko is very depressing, and Spidey's radical change when strapping on the black suit shows us a new side of Peter Parker. There's more to it, including Harry becoming a LOT more likeable.
Yes, I'm loving it.