Making my mockup a reality

[Magice]

Alright I need some help here.
I need to turn my original mockup into an actual site.

Here is the mockup
http://img411.imageshack.us/img411/7930/latestmockup4ml.jpg

Here is the link to what I have done so far:
Files (http://members.shaw.ca/magice/web.zip)

If anyone could help me on the code it would be great!

What I need:
- To have the categories and subcategories in the proper locations
- Add a drop shadow to main white content box
- Ability to hide navigation box
- Propped up and rounded at bottom

Any help would be greatly appreciated!!