you need to copy the apks that you want to system/ apps on your phone.
Not to steal the thread but I was wondering the same thing. I want the backup assistant app back. I want to be able to backup all my contacts thru VZW so if i switch phones (probably not going to happen but...) I always have them. I have the apk file and added it to the system/app folder and installed it then rebooted but no luck any ideas?
I'll help out any way I can! That's what Android is all about.