2
For the root directory of your site:
- CHmod all your directories to 755
..except for cache, templates_c and upload which are 777.
If this also concerns all your subdirectories:
Well most subdirs are also 755. If you have some modules with their own upload directories and stuff this might be different. But after all there won't be many directories which need to be changed.
- i would change all of them to 755
- then if neccessary do a 2nd XOOPS installation (into a different directory connected to a subdomain, different database names(!) ...) with the same modules you are using and check there for different permissions.
- if there are differences ... adapt them
- when done you just might delete the second installation