Win 7 login screen background problem

My VDU setup is as follows:

I have a Windows 7 machine with three physical VDUs and 2 logical ones. My machine only supports 2 screens, so we have put in a Displayport splitter. Now my pc thinks it has one 1920x1080 and one 3840x1080 screen even though I in fact have three 1920x1080 VDUs. This works just fine when I am logged in, but not so well when I am at the login screen (see attached picture).

I have made a background picture that is 3840x1080 and this seem to work fine when the 3840 is set as the main screen, but I would rather have the 1920-screen as main screen. That also works fine when I'm logged in with the exception of the background. Then the background on the 3840-screen looks like the supplied login screen sample. That is strange really.

So to recap, When the 1920-screen is main screen it looks weird both when I am logged in and when I am at the login screen. When I set the 3840-screen as main screen it looks fine when I am logged in, but the login-screen looks a bit weird. Also, since the middle of the 3840 screen comes just where the two physical monitors meet, error messages, warnings and pop-up windows show just there and divided in two.

So my question is this: Is there some way I can get a 3040x1080 login screen background and have the 1920-screen as main screen (with the Windows bar and menu button etc)? The file that I use as login screen background now is actually 3080x1080, but WIn7 doesn't seem to take notice and compresses it. I have made a background3840x1080.jpg file and put in the c:\windows\system32\oobe\info\backgrounds-directory, but that didn't do anything.

Please help!

Brgds
Login-screen.jpg
Iver Erling ArvaSenior consultantAsked:
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Jeremy TyreConnect With a Mentor Distributed Computer Systems AnalystCommented:
The easiest way of handling this is through software like DisplayFusion.  Without having the monitors in front of me it is hard to test.  Is the center monitor set a primary?  When you click identify in the screen resolutions does each show their own number?  (Dumb question ->) Do you have the latest drivers and not Microsoft's?  Please provide a screen shot of the screen resolutions for each monitor.  That would help a lot.
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Iver Erling ArvaSenior consultantAuthor Commented:
That's what I have done, used DisplayFusion ;-) Thanks for the tip!

Brgds
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