Un boot screen, c´est une image que tu verras au démarrage de windows, pendant seulement quelques secondes.
C´est bien ce que tu veux ?
Pour en installer un, il faut suivre les instructions données sur le site :
Boot Screens
If you have multiple logon screens that you would like to select between, please look at this app. Looks like a very nice utility.
1 - Backup ( copy) the file %windir%\system32\ntoskrnl.exe ( most likely C:\windows\system32\ntoskrnl.exe - the boot screen)
2 - Download the . zip to your computer
3 - Extract ntoskrnl.exe to a directory other than %windir%\system32 ( most likely C:\windows\system32)
4 - Reboot your computer into Safe Mode ( hit F8 before the boot screen) or into true DOS ( from a boot disk)
5 - Overwrite the file %windir%\system32\ntoskrnl.exe ( which should have been backed up) with the extracted exe
6 - Reboot your computer as you normally would