Okay... no help so far. I played around with coding and finally found one way of doing this. Since I'm using random images, I'm using php include and just putting the random image coding in a seperate file and 'including' it into the other.
I put the php include in the footer file but before div class="footer" but there is still a few problems with this. First, to get it to align anywhere, i had to use p align:right. After using that, it aligned very near the bottom of the sidebar right above the footer. BUT still not touching the footer. I'm guessing its something to do with the footer padding or something. Another problem, the image makes my pages longer using this way, which I'd rather not make them longer.
For now, this will work for me, but I'm still asking for help.