20
It looks like his document root is /data/
And XOOPS root is
http://his_website/roofstar/html/This would mean that the folder named protected would then need to be in /apache22/protected/, not like I said earlier (/data/protected/)
So move xoops_lib and xoops_dat directories from /data/protected/ and place into
/apache22/protected/ and rerun the install to see if the errors go away.
It is too early to be registering users. You will be unable to register users if your installation is still showing errors. Continue installation until you get no errors, and accept Mambas offer if you need to. Once installed correctly you can then register new users.