This is a fully functional version of XP Corporate.
Features:
Full unattended install.
No cd key required.
No activation.
NO IE.
All drivers have been retained.
All networking components intact.
No balloons pop ups.
TCP/IP Patch installed (allowing 100 connections, as opposed to the default 10 in XP SP2, which may help bittorrent speeds).
NO "send error messages to M$".
NO help BS.
No M$ win updates.
All language packs and support have been removed except for English.
Administrative Tools was added to My Computer, for EZ access.
Numerous other tweaks were added.
This is the perfect OS for the person who uses a computer for gaming (after install, xp was only using 100MB RAM).
Reduced a 590MB to a sweet 295MB hassle free version of XP.