Alright, if you go to
this place you will scroll down to the absolute bottom of the page and place a V left from the
I have read and accept the EA Online Terms & Conditions text. After you've done that you can click on the green bottom Download which will give you a popup menu which tells you that this program, which is called 'worldtool' is 156 MB large.
This doesn't sound to large in my opinion, but remember that it is the stuff you make, the complete world files will take up more space, especially if you make a large one.
It has been over a year that I've fooled around with Create A World, so for more details you can not ask me. But take a look over
here to get an indeph tutorial on how to handle this thing.
Good luck! I like to hear if this information was usefull to you.