If you want to shrink it, bring it into a program like Photoshop, GIMP, or even Microsoft Paint, resize it, and then upload it to an image sharing site like deviantArt or Photobucket. Copy/paste from there. I'd actually suggest doing this.
Or, you could put it in a spoiler tag. In case you forgot, the one you need goes like this:
[ spoiler = text ] imagegoeshere [ / spoiler ]
Just remove the spaces from the tags.
And yeah, your sig actually exceeds the size limit allowed ^^ Sorry, but they are legitimate complaints, not baseless whining. Er, ignoring the other members of site staff and the forum moderators definitely wasn't the best idea either.