I'm looking for someone to help me with how I can datalog with my Diablosport tuner I know nothing about. Also can I safely modify the tune for a tank of 100 octane.

To datalog the best way, you need the RS232 cable and a laptop, the software is free from Diablosport.

Modifying your tune, there is no way in hell I would touch that. Take it back to the guy that did it the first time, and ask for a dual tune on a flip chip