PSP only supports 29.97 (current firmware 2.6). That's the way it is.
The sync issues caused by interleaved VOBUs and mullti angles are gone. Make sure you use a good decrypter with Arccos/Riplock protected discs (AnyDVD). If you want speed, make sure you are not writing on the memory card with CloneDVD mobile directly. This is incredibly slow, much slower than with previous versions. Write to harddisk, then copy the result to the stick.
To get the same quality & speed as old versions, change the devices.ini and remove the quality settings from
The picture quality will then be as it was with 18.104.22.168