Have you read the sticky on optimizing Limewire? (http://www.gnutellaforums.com/showth...threadid=27036 I think you have, seeing as you've already tweeked the settings a little). I'll bore everyone but retelling my "success story": following those steps I download with top speed with these settings.

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iMac G4 OSX 10.3.9
RAM 256MB
LW 4.10.5 Basic
ADSL anything from 3 to 8Mbps/around 1024kbps

"Raise your can of Beer on high
And seal your fate forever
Our best years have passed us by
The Golden Age Of Leather"
-Blue Öyster Cult-