Is there an app out, or would it be easy to create an app that would allow for simple setting of the background wallpaper without having to always go through the preferences settings app to do so? I think all that would need to be changed out is the LockBackground.jpg in the /System/Libraries folder, but is there a way to do this? Alternatively, is there a plist I can change to achieve a similar effect? I already changed my preferences plist for easy wallpaper access, but it still takes 3 taps to get to the selection screen... Is there any way to get that down to 1...?
In all honesty, rather than install another application, that needs to be loaded, and then a preference set, I would rather not install the application and change it in three steps instead of two. Sorry, I just don't see a huge need for what you're looking for. I'm not saying it can't be done, but if developers also don't see a need, you probably won't find that anywhere.