:::10 easy steps to do this, Here you go::::First of all you need 2 programs for doing this thing:
ResHacker -->
http://www.users.on.net/johnson/resourcehacker/Replacer -->
http://www3.telus.net/_/replacer/1. Go to the C:\Windows\System32\ Folder and copy the
msgina.dll into a temporary folder.
2. Then you open ResHacker and open the "msgina.dll" in there
3. There are 5 Folders which have to be changed in the Bitmap tree:
- 20140
- 20141
- 20142
- 20143
- 201504. Each Bitmap of each folder has to be saved into this temporary folder,
make a "Original" folder inside, for better overview and put these bitmaps in it,
by rightclick -->
"Save Bitmap as..."5. Then you open the 20140 Bitmap and start modifying it.
After you finished modifying you have to save the images with the
exactly number of each bitmap.
Bitmap 20140 and 20142 are the same Bitmaps, so you have to save them twice.
6. Then you open the button bar bitmap "20150" and start modifying the buttons.
You have to make the background the same color, or image, the 20140 Bitmap has.
7. After modifying the files, open ResHacker again. Load the msgina.dll,
replace every bitmap:
- 20140
- 20141
- 20142
- 20143
- 20150
8. Then just Click on File --> Save in ResHacker, a backup-file of the original file is created in the system32
folder named "msgina_original.dll" or something like that.
9. At last, download Replacer and follow the steps that are written in the cmd window.
- Choose msgina.dll from system32 and press enter.
- Choose modified msgina.dll from your folder and press enter.
- then confirm with "y".
10. Reboot your system and have phun with your new Shutdown Prompt

Best Regards,
NiZe@ce@admins, maybe you could make this one a sticky?