So I'm playing around with creating a new world space, but in the options for it, the menu tab that lets me choose all of its attributes, it won't let me scroll down further to check the Small World box, or the OK button. It's like the Window is too big. Does anyone know how to resolve this?

Many of the windows in the CK can not be re-sized and unfortunately worldspaces window is one of them. If your using Windows 7 make sure your "Make it easier to read what's on your screen" setting in Personalize/Display is on Smaller - 100% (default). If that setting is already there then your going to have to Increase your screen resolution.

I have the same problem. You can hit enter to activate the OK button to save, or if you're on win7 you can rotate the screen from vertical to horizontal (you'll have to turn your laptop or head to side ) from dekstop's screen settings for a couple of seconds and tick whatever you need that's bellow the screen.