Also if you need help with stuff there is a great team at www.hot-graphics.tk and they will be very happy to help. just post in ther and its your dream for support so just click on my sig or go to www.hot-graphics.tk
To make cool backrgrounds you really need to randomize with brushes. Go to deviantart and download some brushes and really brush randomly. Add a color balance or something and you should get a nice effect.
Brushing with direction and choosing the right brushes usually works a charm. Also filters and sometmes vector shapes.