Download Restorator from (click here) - Make a copy of ntoskrnl.exe from C:\winnt\system32 to the desktop - Open it in Restorator. Go to bitmap resource 1, right-click it and choose Extract as 1.bmp.
Open 1.bmp in Paint and edit it, but keep everything from the blue gradient bar down (do not edit that part), save as 16 colors - Go back to Restorator, Right click bitmap resource 1 again, choose Assign to, then 1.bmp - Save file and exit Restorator.
Boot to DOS (assuming you have a DOS floppy handy, and your C:\ drive is formatted as FAT)make another copy of the original ntoskrnl.exe to somewhere eg C:\temp for easy emergency access, and keep it there.
Take your new ntoskrnl.exe and copy it to C:\winnt\system32 then copy it again to C:\winnt\system32\dllcache. Reboot into Windows If all fails, boot back to DOS, and copy your backup ntoskrnl.exe back to C:\winnt\system32 and C:\winnt\system32\dllcache
click here for a better explanation
Not as simple as 9X eh....