Download DrTCP: »/front/drtcp.html In DrTCP, Set your Tcp Receive Window to 64240 (Leave everything else at the Defaults), Save the settings, and Reboot. Next run the Tweak and Speed Tests again, and post your results.
-Tursiops_G. -- If You're Unsure, "RTFM"... If You're SURE, "RTFM" Anyway.