For anyone interested, here's how I did it:
1. After you've logged in, click on "customize" in the upper right-hand quarter.
Also, you may need to play around with it. It initially creates it for the right column, which made my cartoon 200 pixels wide! One I placed it in the main column, I simply re-loaded the image and it made it the correct column width.
3. After you "Add Gadget", you need to drag it to the top of the main column and place it above "Blog Posts."
4. Click on "Preview" to make sure it appears at the top of the page. If it does, click "save."
That's all I did. I want to play around with it more, but now I have a cartoon to draw. Hope this was helpful.