Sorry--I thought you'd read through the forums.
see
http://www.gnutellaforums.com/forumd...?s=&forumid=81 especially the forum "rules" for what specs are helpful.
http://www.limewire.com/english/cont...ml#Downloading is also handy (your LW Help menu has more links too)
The bottom line is that even though you can tune your system and setting to allow the fastest possible downloads, if the person(s) sending you the files are busy or slow, all you can do is try to find more, or just be patient.
see if this thread helps
http://www.gnutellaforums.com/showth...threadid=24879
cheers