second add of addsense beside one

[Kenas]

I have just below the navbar 1 add from addsense that is sticked to the left hand side.

www.gsmforum.es

How can i or center this add to the middle or add another second add just beside it sticked to the right hand side.

Tyvm !
Happy New Year.
Kenas

[Kenas]

<p style="text-align: center;">Advert Script</p>

works perfect to center the banner