I took the copy of your diablo tune, and made fixes to it.. and saved it as a custom tune.. so import that custom tune to the predator and install it to your car - it should fix your issues now...
it already has your cats disabled, etc etc.. so you don't have to change anything.. just install the tune and drive...
doesn't matter what they used it on, they couldn't have changed the settings in the diablo tune, since it was unlocked/reset, anything they changed would have been reset... plus, there were some tables whacked out that you, the end-user, wouldn't be able to change anyway...