Wow, thanks so much for the app (and the links on the no-intro tools - not sure how I missed that one). When I get a spare moment in the next two days or so I'll definitely try them out as I did the EXACT same thing (Goodx w/changes + NoIntro snaps + .dat files)!
(I had posted the same issue on another thread here, guess I should've kept searching through the pages til I found this thread haha)
Thanks again!