Yeah, there isn't really a website that you can download EU
from (that I know of, anyway)
As Strong stated, you CAN copy all the files from one computer once you have the game installed. The most important filed are under Users>Public
folder. There are two entropia universe folders. These contain all the dynamic content.
Then, paste into same folder on the ther computer, and run the installer. Should be all set, minimum fuss.