The FAQ hasn't been updated for ages, so I really wouldn't count on it. But usually there's a readme file included in all downloads that shows which patches were applied to a certain firmware. What I typically provide these days are
- unmodified firmware (orig)
- bitsetting (bt_orig)
- RPC1 only (rpc1)
- Auto-Reset only (auto)
- bitsetting + RPC1 (bt_rpc1)
- bitsetting + Auto-Reset (bt_auto)
For slimline drives I also include riplock patches and bitsetting patches are only available for those firmwares that allow bitsetting patches.
RPC1 firmware leaves it up to the playback software to take care of region settings. Auto-Reset firmwares pretend to obey region coding which should make the software leave it to the drive to take care of regions, but without permanently changing the region code.
If the firmware info shows "Yes" for bitsetting on DVD+R DL, then my bitsetting patch allows changing the booktype ALSO on DVD+R and (with restrictions) on DVD+RW