It's still a work in progress. I've attached some preliminary files and documentation that might help--please let me know if you have any questions or problems with it. The file is called data_reduction.zip (see the link below)
Also, here is another link you might find helpful--a discussion regarding the reduction of IAT data files:
www.empirisoft.com/support/showthread.php?t=836
Here is the link for the data reduction zip file: