Blue Background Login Screen Problem

Hello everyone,
I tried to change my login screen's background using sudo commands and now it's this light blue and I can't seem to change it no matter what method I try.
This is the method that messed everything up:
http://www.macosxhints.com/article.php?story=20070610164328933
I looked in my computers login plist as well as my CoreServices folder to make sure that the login image is the image I want and they both have the correct folder down. Has anyone had this problem and fixed or helped someone fix this?
This is a purely aesthetic problem but it's really, really getting to me. It's almost to the point where I'm trying to revert to an older time on my computer (Time Machine?).
If someone could please help, it would be greatly appreciated.

I found the solution to this problem on another forum. If anyone finds this, this is what you do:
Delete the com.apple.loginwindow.plist that you can find in the /Library/Preferences folder. After this I recommend using an Application to set your backround (so that you aren't fiddling with things yourself). You can either use Desktop 2 Login or Login Back -- either work. Anyways, I'd back up your plist file before you delete just incase. This worked for me and hopefully it works for you.
--Travis

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panic(cpu 0 caller 0x001032B4): jnl: bp @ 0x2152b640 changed size on me! (4096 vs. 4108, jnl 0x174de60)
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0x00247AF0 0x0022BFC0 0x000FE64C 0x000DB9F4 0x000E00D8 0x000DFD18 0x000DF96C 0x0023A574
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Grant:
The four bricks on gray background is a Display/Driver problem of some kind.
What display card are you running?
My first thought was a display problem - but the card seems OK (info below)
because tartups from any disk other than the one running 10.4.9 are OK.
If the driver were bad would one expect to see the
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is the best first approach to resolve the problem?
Thanks so much!
bdennehey
ATY,Rage128:
Chipset Model: ATY,Rage128
Type: Display
Bus: PCI
Slot: J12
VRAM (Total): 16 MB
Vendor: ATI (0x1002)
Device ID: 0x5245
Revision ID: 0x0000
ROM Revision: 113-57407-204
Display:
Resolution: 1024 x 768 @ 85 Hz
Depth: 32-bit Color
Core Image: Not Supported
Main Display: Yes
Mirror: Off
Online: Yes
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Message Edited by Agotthelf on 25-03-2009 09:55 PM

Interesting you mentioned ATI...
when I use F8 during the boot process, and used the enable boot logging,which writes to ntbtlog.txt
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