General :: Change Wallpaper On Settings Submenus In CM7?

I currently use a HTC HD Mini (Photon) running the SCREAM ROM by Ling Gan. It has a few bugs for most of which there is either a workaround or fix but there is the one problem which has remained unsolved: the default wallpaper on everything BUT the home and lockscreens cannot be changed. It is of a tree in a meadow under a blue sky and when rotated to landscape changes to some smiling chinese lady in the "settings" submenu. Doesn't hamper use much but it is quite annoying.

I have tried a number of solutions some of which resulted in my having to reflash and others did nothing. I post this here because I think it is a CM7 issue. The ROM developers have so far been unable to post a solution within the thread and I am aware that a fix for similar problems on CM9 ROMs exists using ADB to edit framework-res.apk. I felt it was time the problem was tackled by the wider XDA fam. Used google translate to look on the chinese site where the ROM is native to (mobile-kon) but found nothing as well.