I believe that if you display the app files (I presume you mean apk's)
in your file explorer, then tell it to "open with installer" or
something like that depending on your file manager, it will then install
them on your primary storage and you'll have them on the sdcard as
backups. You would need to go to... wtf is it, "developer" settings I
think, maybe privacy/security, and tell it to install apps from unknown
locations before opening them (undo that afterward, as if google-apps
doesn't qualify as an "unknown source"). And as I recall, on KitKat you
have to click on the build-number seven times before you "become a
developer" or some such shit, if you can actually find the build-number
wherever they've put it... "about phone", maybe.
At least that's what I'd try, I've been off in BlackBerry land for most
of a year and the Android tablets that I have are being used with pretty
much stock applications.
I hate easter-eggs and crap software, so please pardon the attitude.
--
http://totally-portable-software.blogspot.com
[Sat Mar 26: "Documentation and Portability"]