its alright.. ways iin which you could improve are getting some brushes and make them into a background, get a cut and put it on and blend it in and add some effects, oh and text.. use a good font and blend it in.. oh and one las thing.. learn to insert pictures
its only got to be under 4.9kb if you broowse through folders and attahc it.. just uplad it and then add the url link to the sig and then it doesnt matter if its 10kb or anything..