It is Daedalus, a project was meant to introduce 32-bit Alpha-Blended icons support in Windows NT 4, and later expanded to work on Windows 2000 too. It is implemented as a service, therefore can be started/stopped on demand, which can be useful in case some conflict arises, though ideally that should never happen
Instructions, the changelog and the download can be found at the winprj.net's topic right here:
Screenshot (combined with NT4 Visual Update 3 Beta 2):
Edited by alexanrs, 01 February 2009 - 07:01 AM.