I have this same problem, can't get to fully connect. I too am computer illiterate (although I can tell the power supply from everything else)
I have XP, cable, setup my firewall w/ the gnutella stuff mentioned on the limewire website, deleted my .limewire stuff, dl'ed that jar file from another thread here, still cannot connect?!?
Why the heck is this so difficult for so many people, it seems you should be able to just download limewire, disable your firewall, or change some settings, then start downloading some freakin music!