Originally Posted by Darnell0216
System Apps can't be "installed". They have to be pushed onto the phone using ADB/Terminal. Unfortunately I don't know the proper commands to give you. Hopefully someone can come along and tell you.
This would explain why time and time again after trying repeatedly to put Magic Smoke Wallpapers back on my phone (you know, one of the cool live wallpaper sets that come stock on at least every froyo phone it seems?), why it always fails to install, and why putting the apk there won't do anything. Surely a little bit of research would tell us how to install apps using adb.