Sidebar pages menu styling and more...
 

I want to style sidebar pages menu:
1. To add background image to each item with clean spacing between them.
2. Is it possible to hide subpages until clicked on the parent item?
And one more question: how can I make text widget on the sidebar to remain at the bottom of it even if the sidebar is almost empty (some kind of "footer" on the sidebar)?
Thanks in advance and sorry for my English ;)

P.S. my site is www.amsspb.ru