It should have disabled it. I think 254 and 255 don't point to anything in particular... they should be null inputs. Like I said, I have to do this to run FPBA; otherwise I get constant unwanted input. You might want to ask the developers if this is going to be a permanent fix for you.
I figured it out....so I had to change every single game's config individually in ux0:data/pfba/configs...I only disable the right analog stick in the main menu using your method. Thanks again for your help!