Anyway to Stretch Lock Screen Across Multi-Monitors?

I'm trying to further customize my windows 8. I'd like to make it so that background image on the lock screen (when you lock an account and you press a key or button to raise the background revealing the password field) stretches across all my monitors. Any ideas on how, if even possible, this can be done?

Thanks!

I should have read down the threads more because I just posted a thread with the same question....I have scoured the internet hoping to find this out. One of the IT guys that I work with said that it may be possible to do it in the registry, but I would have no idea how to do that, so I came here Good luck to us both!

I would LOVE to know the answer to this as well! I have Win8, and have Triple Monitors- the lock screen sticks in the middle one and stretches just a little bit onto the sides of the other two. I can't figure out how to get it fully onto all 3. I have tri-screen backgrounds 5720x1200 that I have set it to use, to no avail.

Any help would be greatly appreciated!!