I still can't fit 4 images to my sig. It says it is too long when I do.

That's because the signature can only go up to a certain height and limit. You should try making your signature as small as possible. Whenever I try to make my signature small and to fit within the rules, I get a whole bunch of blank spots at the bottom that just seem to never go away.

I think the maximum character for signature is 150, I don't remember exactly, however, you should try the following page to shorten URLS and make them fit:
bit.ly
That wil probably help you alot.