I have been playing around with this some more. Fujitsu updated their drivers for the 7160 on 2/20/2014. I downloaded these and re-installed. They are calling it the PaperStream IP (ISIS) driver. (Version 1.7.01402.07001)
I am still unable to get the scanner to be recognized by Scan Connect. I do see a lot of older models in the selection dialog (as in the fi-5120, fi-6130 ect)
They are using LF 9.1 with Scan Connect 8.3.
I tried the testappn.exe. The scanner was not listed in the list. I have attached a screenshot of what I see. What is interesting to me, is that when this dialog comes up in the LF Scan interface, there are a LOT more options for scanners. When trying to select a scanner for the testappn.exe, I do not see the same list as when choosing a scanner for Scan Connect in LF Scan.
I did try the KB article you mentioned. When I copied those files into the PIXTRAN folder, it prompted me to overwrite. They already existed in that folder. When I tried to configure Scan Connect, the scanner is still not showing up in the list.
As I said before, when we configure with TWAIN, we can scan without issue, though we would like to get it working with Scan Connect and ISIS.