just go and get PHPNUKE - my grandma´ could probably make it work thats how easy it is - get it on
http://www.phpnuke.com - but if you want some more to choose from, then go to
http://www.hotscripts.com as mentioned earlier - go to the PHP section and find the category (scripts/programs) and choose Portal systems - in there you will find tons of easy to install Newbee stuff, like 99% of all DF sites are made of LOL.