Go to this page: [Only Registered and Activated Users Can See Links. Click Here To Register...]

Find where it says "Custom CSS

If you would like to customize the look and feel of your profile, please specify custom CSS here."

There will be a box below it. Copy/paste the code you quoted above and click on the save changes button at the bottom of that page.

Thats it

For more cool layouts go here: [Only Registered and Activated Users Can See Links. Click Here To Register...]