your sig is about a page on my browser which is what a lot of people have. If want to shrink it even more, you can go back into your sig code and delete any spacing between the two codes, this would put the two pictures side by side. However, that would mean you would have to move the message under your other sig. But like i said, I think its fine the way it is.
Oh, and a little side note, you can center your entire signature if you put "
around all your text and code.