So I have multiple sigs, would like to put them all in one and have a random one show up each time page gets refreshed
Anyone know how to get this accomplished?

I saw someone using http://signavatar.com/ for this. It's free and seems convenient enough; you just point to the urls of your images and they give you a url to use that randomly picks one of the images.

Grumpybumpers ( http://sig.grumpybumpers.com/ ) is also a solid signature rotator alternative, and extremely simple to set up.
You just add the direct image URL of your desired signature images to the rotator, and then use the rotator's main URL as your signature image.