Supposedly, there is a file included on a disk for those who preordered and those who got the collectors edition of SOA which added a few new shopkeepers to Wakeen's Promenade that sells a few new items... if someone can please tell me where I can get that file, I would be very grateful

http://www.sorcerers.net/Games/BG2/index_editors2.htm

right at the top :)