Thanks Meter 4
Join Date: Jan 2008
Brut doesn't have to go in /system/app, as I recall. I believe I installed it and the navigation option before I ever had root, so there was never any chance of getting into /system.
If you really do want it to go in /system/app, then you need to:
Boot to recovery (get the green menu screen)
Get into an adb shell
Inside the shell, run "mount /system"
ls (to find what the relevant apk is)
adb push <location of brut.apk> /system/app
That should be it. I take no responsibility, have a full nandroid backup, etc etc etc, but that's all you have to do.