Hi to all...
First time, scuse me for my english...

I have this problem.
Actually I have installed to my site the ASTRO2 theme.
This theme is great but for my use I need three column but this theme have only 2 columns.

My question is this?

Can I add a column to the theme? I need to add the right column that now don't be inserted.

It's possibile this? How can I made this?

Thank for your help, I need very urgently this info and all your help is very very very appreciated.

Bye and thank you

look in the default XOOPS theme ...

/themes/default/theme.html

I am affraid it will not be so simple as that.
The Astro2 theme is a tableless theme with a fixed width. The designer has found an equilibrium in the division of spaces. Adding a third column will need a lot of tweaking to find a new balance between the various dimensions. Also the used background images may get impaired.

If you want to change it anyway, these are the tasks ahead:
You have to edit theme.html in which the right blocks (xoops_lblocks loop) are now added at the end of all left blocks (xoops_lblocks loop) in the side column (side_area). To start you have to duplicate this div and rename all id's in it to rside_xxx. Then delete the one of the loops in either div.
In the CSS file copy all side_xxx selectors to rside_xxx and adapt all positioning and measurements.