When I download apps that are distributed as virtual disks (.dmg), the background of the Finder window is often different and pretty darn cool. I want to be able to tweak the background of some of my Finder windows just like they do. What's the trick?

How do you hide files and applications from showing up in the today, yesterday, and past week section of the finder sidebar?

I've set Thunderbird as my default email program and set Apple Mail program preferences to use Thunderbird as the default program.

But here's the thing. When I open saved emails from my hard drive the Mail program opens them and says it's the default. But Thunderbird receives all emails and sends them?

I'm running Mac OS X Snow Leopard and everything's going smoothly except for some reason I find that not all my default folders are showing up on the left side of Finder windows. Specifically, where's my "Movies" folder??

So problem here is that I have accidentally removed the application shortcut from the left hand menu in mac os x finder. The one that opens all the installed program shortcuts. I searched prior to writing this, but I only got how you restore the springy url terminal activator. Mac OS X, version 10.5.4