Upgrade XP Home to XP Pro by changing 2 bytes
German Computer magazine C'T (Heise) is describing in its current print issue how to change Windows XP Home to a Windows XP Professional version before install.
Microsoft is not going to like this. The C'T magazine apparently found out that by changing 2 bytes in the installation file of Windows XP Home, it will install a Windows Professional. Some functions are missing, but Remote Desktop and User management and enhanced security features are present.