Hey....
i need to know how to decorate pics like that one:
http://a736.ac-images.myspacecdn.com/images01/26/l_77792baca1df854d525caedf401f798f.jpg

Use layers and brushes. Fill the layers with any colors then play around with belnding options and then add brushes

PSP brushes (http://websoup.org/resources/links.php?cat=33)

Photoshop brushes (http://websoup.org/resources/links.php?cat=32)