[For 1.8] Square theme

[ecoo]

Hey there, great theme! I have a couple of questions:

1. How do I add another sidebox below/above the current "Latest Activity" sidebar?
2. When logging in, the fields are prefilled. The problem is, you have to manually erase the prefilled characters. I would prefer if I could just get rid of prefilling or when the user clicks in the field the characters disappear.
3. There are boxes when viewing threads that are dark blue, such as the "reply" or "multiquote" box. How do I change their colors (where exactly is their theme/template?).

Thanks!