For the fast spinning logo see the 'Updates' on the front page "clock with slow animated logo (new)"
If you you will find the .ini file that you need to change to centre the logo. I think it may be the skin.ini but not sure. as I said if you you will find the answer.
For the vis, yes you are correct the 'eye' button will lunch the vis, but you need to make sure that you have it set up in the RR config. (AVIS or Milkdrop etc) and have the correct winamp plugin installed. Again there are lots of posts about how to set up the VIS. For full screen I manage to just double click the vis when it's started in the small window, which launches it into full screen, then i just double click anywhere on the screen again and it returns to the smaller window. I'm not sure what my settings are, but just play around with it when you have it launching in the small window.