Flip Phone compatibility

[SZRabinowitz]

There are some flip phones (android) which by default don't allow apk installation (and don't have google play), however, there is an exploit. If you change the package name of an app from com.example to com.android.cts.example. This is usually very easy, I just use an APK editor to change the package name. But since your app installs other apps, I cant change the package name of those apps. Is there a way to change the package name of the apps you install.