Soft reset didn't matter. I don't think it's the same message that you're thinking of. This exact message reads "Installation was unsuccessful. The program or setting cannot be installed because it is not digitally signed with a trusted certificate." This is for the peer-to-peer navigation program from
Navizon - Virtual GPS for mobile devices and laptop computers I had this installed once already, and I uninstalled it before I realized I could still find it useful. Now, the phone is not allowing the program to install.
KaiserTweak isn't doing the trick. What I need is to find the file that I could modify/delete to allow programs to be installed regardless of certificate.