I fixed this like you said, but I have problems with IPB Forum, something goes wrong if my old registered group from XOOPS is changed. So, I'm looking for some better solution.
Can I somehow control in witch user group my new registered users will go? I have admin, registered, anonimous, testers and other groups. But I don't want for my new registered users to go directly to registered user group. I want them automaticaly in testers (witch don't have access to all parts of portal) user group. Is that poslible?
You could use XOOPS Multilinguage hack for xoops. Drawback of this is that you must hack all modules you use. In this packet there are allready some hacked modules.