How can i create a wallpaper using adobe photoshop cs2, or if there is a website with tutorials on how to do this, I wil be gratefull.

Thanks

There are many sites that provide tutorials for photoshop. Google search them. Here are examples:

http://www.tutorialized.com/search.php?id=1&s=create+wallpaper&arrow.x=0&arrow.y=0

http://www.planetphotoshop.com/pattern-maker.html

http://www.photoshopcafe.com/tutorials.htm