I have a full size photo I am using as the background wallpaper on my iphone 3g on 4.0.1. When you select to use it as wallpaper, it has you move and scale it etc.

I am assuming when you scale it, it creates a new file that's scaled down which it uses as wallpaper.

I would like to use the same image with the same scale and zoom etc as the folder background also (for a transparent effect). I know you can just replace the FolderSwitcherBG file via SSH. The problem is that I can't find the RESIZED version of the wallpaper file in the phone.
Anyone know where this goes?

Here are a couple of screen shots to give you a better idea of what i mean..

Here's the background showing up on the springboard..

Now, when you open a folder, i'd like this background to be an identical copy so it doesnt look like this...

Thanks for the help...