Vista - Changing the Boot Screen

STEP ONE:
Navigate yourself to C:\Windows\system32\en-US for english; \NL-nl for Dutch and so on for each language available for Vista.

STEP TWO:
Find winload.exe.mui and open the Properties for this file.
Click on the 'Security' tab, now choose 'Advanced' and set the ownership of this file to 'Users'.

STEP THREE:
Now you need to copy and paste your desired background and replace it with the background from the folder 'system32\en-US folder'

STEP FOUR:
Now, goto 'Start > Run' and type 'msconfig'.

STEP FIVE:
Choose the 'Boot' tab and now enable 'No GUI Boot'

STEP SIX:
Close msconfig and reboot your computer.