I saw this on VCool.
This little utility will cool your Athlon/Duron processor on Via KT133 or KX133(A) (VT8363, VT8361, VT82C691/693A/694 or VT8371 +VT82C686x) chipsets during idle.
For direct download and see the bug fix click on Read More...

Build 5 contained a bug that would prevent the PCI options from working on some KT266 boards - fixed.
Click here for direct download.