I've been poking around the filesystem of my freshly rooted MID9742. I see the .apk files in \system\app. I assume that's flash memory and not part of the ROM. So why can't I just copy Google's googleplay.apk (or whatever it's called) into that directory (on the device) to get google play ? Why do I need to modify the binaries in the ROM & risk screwing up the drivers as so many here have done?