Stacks - Customize

How do I customize my stacks? The stack I have at the moment comes out in a list but how do i make it come out in a nice grid?

How can I add recently accessed/used documents and files? (I have recently used applications by following terminal commands)

What other cool stuff can I have or do with stacks?

To view them as a grid just right click on the stacks down in the dock and select View As > Grid.

I don't know if this has been posted but its a very good Leopard Tweaking Guide.

So here's the link. Enjoy!
http://www.appletell.com/apple/comment/ultimate-leopard-tweaking-guide/