ok here is tutorial for those know their way around the photoshop, simple and easy.
ok here is my first tutorial for an easy sig.
first press D then press X on the keyboard(this will set the foreground and background color ready) now open a new document with this sets
and you you'll have this as background
now choose your brushes
now brush your background nicely and you'll have something like this(i chose some grunge brushes, i will put some link for brushes later)
now press cntrl+j or right click on the background layer and duplicate the background and set the blending option into light
now use this set(depent on what render and background you got play around with the blur set, grunge background less blur, abstract background mor blur)
now while your on the copy layer of the background chose the gaussian blur
now use this set for the blur (depends on what background and render you use change the set, grunge background less blury, abstract background more blury)
now merge the background layers
now choose a render i used wolverin for this tut
now click on the render and drag it into your background layer
and possetion it anywher you like