There was a post fairly recently on this thread about using X-plore to get into the bowels of the Z drive and install the preinstalled items onto a memory card which you then re-format. It helps to have a spare or new card, so you don't delete everything you've loaded onto it. The programs for the AT&T malls don't seem to be in there, but the AT&T Nav program is there, masquerading. I opened the non-folder file to see what program the file is for. Once I installed it onto the card, removed the card, and went back in, it let me delete the ATT nav icon. Lots of people travel enough to find it useful; I don't so Google maps is enough for me - not worth $9.99 a month. I also deleted the Weather Channel, since the program is a demo, and you can get the same info for free. Not to mention the games, etc.
I would like to know if anyone figures out where the mall files are located. I found the icons for them but didn't feel confident about the consequences of deleting those.