5
The first thing to do is read
This thread about the auth moduleIt's a bit sketchy, because it's been translated. The gist of this is that you install the auth module as any other XOOPS module.
then place your php or5 html content into an allocated folder within the auth directory. Its set for 'sample' but you can change this and also use others as well.
Now, there are sevearl settings that you can use to determine how auth behaves, but generally it will make your website appear within the center page area of your site.
any links on the pages will be active and load pages back into that center page, as you would expect.
It's important to understand how the module works though. It only respects certain file types which you have to set. You may also need to change all your internal URLs of the wrapped website, so that they become relative.
All this is explained in the readme file whicjh is l-o-n-g but essential to read. Likewise this thread I posted.
I can't pretend this is a procedure for beginners, though.
Good luck, if you can contact noisia, you will get much more specific help, I think