Several years ago, we used a program by Gildor to obtain models, textures, etc. from BioShock and BioShock 2. Now that BioShock Infinite is a few days from release, I inquired if support may be attempted for it: http://www.gildor.org/smf/index.php/topic,1768.html
In short, he may not have time, but he will try to add support. However, he requires the game to do so. If anyone is willing to gift him BioShock Infinite to ease the process, it would be much appreciated.
Edit: RipperOne gifted gildor the game. Your aid is no longer required.