FirebrandX has just released a video that demonstrates how to use paulb_nl’s Open Source Scan Converter (OSSC) profile creation website to make your own profile packs: http://pbnl.byethost7.com/ossc/profiles
The combination of Paul’s profile import feature, the new firmware with both an on-screen display and more advanced timing support and FBX’s optimal timings is so substantial that I re-wrote the entire OSSC section of the website: https://www.retrorgb.com/ossc.html
Please see that page for all the details, but there’s still one thing we’re missing: What games for each console use alternate resolution modes! FBX has already compiled quite a bit of info on Genesis resolutions, but to get the most out of our OSSC, we’ll need that info for all consoles. If people are willing to contribute, I can open up a public document that will soon be imported into the wiki, once that launches. Please contact me if you’re interested.