[Code P2096 Now what?]

I did start off in that direction some months back.  I bought a tactrix cable, downloaded openECU.  I was able pull the ROM down to my computer.  A .bin file.  But I couldn't open the file in I think in ROM Raider??   It wanted a definitions file.  I went to the romraider forums seeing some definition requests, but nothing ever came of that.  I did see some other avenues to try but I actually backed off of that approach.   Because I started believing that I was just "turning off" the code.  And that my car would run in a sort of limp mode still.  Which I have had a drop in MPG and people do complain the outback has been choking them out. 

I'd be willing to tune out that code to see if it'd work.  Just not sure how.

[Code P2096 Now what?]

Resurrecting this to see if you ever found a solution?  Have this myself on my 13 Outback 2.5i.  Had a P0420 at 100k miles.  Came up every few months, then I gutted the cat and put a "mini cat" in the rear O2 sensor port.  Have 130k miles now.  Started getting a P2096 every 50-200 miles.  Thinking about maybe trying an O2 simulator.  Thanks for any help.