As has already been said, the SCAP hardcover contains the statblock entries for everything you need to run it. Obviously you need the core trio of books, but that's really it.
Two things that might be useful;
http://therpgenius.com/index.php They've just redesigned the site and it looks like you need registration to gain access, but there are a bunch of scanned materials ready for handouts. Materials like that. Secondly, I'd gone and updated all the statblock entries for Chapters 1-6 (the first half of the AP) to the new statblock format. If you want, I could make the Word doc available to you.
That being said, 1} some of my baddies are altered to Eberronize them or simply make them fit my campaign better and 2} some of my baddies are altered due to either House Rules or the fact that we play Gestalt. For instance: we play with the Dodge feat not requiring a named target; you get a flat +1 dodge bonus to AC for the feat. That's incorporated into my statblocks, so you'd have to manually hack it back out.