They all basically use the same technique. I assume the other regions work that the EBOOT is being used from, but have not tested yet.
Catherine [BLUS30428]
Use EBOOT from BLJM60215 update. Use NPJB60215 as conversion directory. If using CFW2OFW tool, change TitleID in PARAM.SFO to BLJM60215 and create new LIC.DAT before conversion. Install Game Data before DTU. Creates "/game/BLJM60215DATA/" directory. Buttons will be in Japanese format (X/O swapped) and some text will also be in Japanese (mostly English) because of EBOOT.
Demons Souls [BLES00932]
Use EBOOT from BCAS20071 update. Use NPHA20071 as conversion directory. If using CFW2OFW tool, change TitleID in PARAM.SFO to BCAS20071 and create new LIC.DAT before conversion.
Golden Axe: Beast Rider [BLUS30209]
Use EBOOT from BLES00391 update. Use NPEB00391 as conversion directory. If using CFW2OFW tool, change TitleID in PARAM.SFO to BLES00391 and create new LIC.DAT before conversion.