I'd like my pet All Hallows Eve to have an image in a 'strip' like I saw with this one. I've been fiddling around for a bit but I'm not sure how it's done, especially the part where you zoom out and it's still going on. Any tips?

You need some sort of a horizontally repeating pattern, in the case of the profile you mentioned it looks like this. You set it as a background image but instead of default (repeat in both axes) or no-repeat; make it repeat only horizontally. Overall sth like this:

body{background-image:url(image url); background-repeat: repeat-x;}

Awesome, thank you! :D I should be able to make something with GIMP easy.

Best of luck! :D