the full install isos are available.. they are dvd sized.. just get the http or ftp download links not the torrent links..

learn to use your eyes around open source sites. often distribution of huge disk images is done by torrent to keep server bandwidth down.

it's easier and cheaper to get the netinstall iso.. burn that to a r/w cd and use the way 90% of the open source community has to install operating systems... of course you can always waste a whole cd on something you will maybe use twice at most.. nobody burns full sets these days.. unless they need offline setup

http://www.ubuntu.com/desktop/get-ubuntu/download