Now this guide was originally written by Darkscorpian in a german forum, I forget name so:
I GIVE CREDIT TO DARKSCORPIAN FOR THIS GUIDE:
I just translated it in english for those of you who dont know hwo to, here you go, and you can ignore the 2.4 parts.
Translated version of http://88321.homepagemodules.de/t1061f66-Mangos-Windows-Server-Anleitung-v-v-Update.html