About theme,

[legacy2]

According to this

Well, I might be able to do some... but there's just so many files!! *might change*

You only need to modify the index.template.php template to affect most of the layout of your forum.  You can do this by going into the administration center and selecting "Theme and Layout Settings". In there, click "Create New" in the upper right corner - then, click the "New Theme" you just created. You should now see options to rename it, and the like - next, you'll want to click "Modify the index.php template".

The problem is that, i can't see create new in the upper right corner, to instal index, there just nothing there.

[Harro]

That could be because it's a post from 2003

What exactly do you want to do?
If you want to create a new theme you have to go to the admin panel -> Themes and layout -> Create a copy of Default

[legacy2]

Yeah, but i cant see create a copy of default, on the themes and layout page, all i see is  many theme options, and at bottom, something with choose.
Cause i have a theme  that  i downloaded that i want to upgrade.
I already  put the css all im missing is the index.