This script is by “Leatrix” and can be downloaded here.
A little introduction from the website:
What does it do?
Leatrix Latency Fix will reduce your online gaming latency significantly by increasing the frequency of TCP acknowledgements sent to the game server. For the technically minded, this is a script which will modify TCPAckFrequency.
You will see reduced latency in many online games including World of Warcraft, Aion, Warhammer, Lord of the Rings, and more.
Leatrix Latency Fix is supported on these operating systems only.
- Windows XP (SP2 or higher)
- Windows Vista (SP1 or higher)
- Windows 7
Both 32-bit and 64-bit versions of Windows are supported.
Macintosh users should read the relevant section in the FAQ below.