Quote from 500 Internal Server Error
You need PocketTool installed on your phone: https://play.google.com/store/apps/details?id=com.snowbound.pockettool.free
download the .zip to computer, extract the patch.mod from the .zip file, copy to the phone, open PocketTool, select Mod Patching - apply - (Menu button) - save changes.
There is a guide by a forum member at http://www.minecraftforum.net/topic/1028001-please-help-me-test-my-minecraft-pocket-edition-mod/page__view__findpost__p__14634040 .
O_0 I had Pocket Tool the entire time and never knew its underlying secrets whoa. Thanks