As I've said I am curious about WinXP core processes, how it works on the lowest level. I hack into it's resourse files (mainly in /windows/sytem32 folder), experiement with RegEdit (choose 'Run' from the Main Menu and type 'regedit'), try to increase it's performance and weight on the hard drive. As a result I get my own personalised OS, which is not very stable (still working on it) but runs much faster than the under the default configuration