these tweaks never work, you can However, enable the QoS packet Scheduler to extract extra bit of bandwidth out of your connection, you won't get amazing downloads speed, but you would get a 5-9kbps more speed, it's tried and tested method which has worked for me. ona 512k DataOne Connection
Go to Start> Run> type: gpedit.msc (Group Policy Editor, only in Windows xp pro) go to Administrative Templates> Network> QoS packet Scheduler> On Right side, you should see: Limit Reservable Bandwidth, Click Enable and Set the Value to 0%, Disconnect, Disable LAN and then reconnect, you would notice a Slight Boost (no jumping from 15kBps to 600!) but a little boost, say you have a 256k connection and you normally get 243kbps, by doing this, you would get around 252kbps. if you're confused, see the image:
