I'm still trying to follow the directions at for-minecraft.com to install BuildCraft alpha 1.1 (http://for-minecraft.com/mods-for-minecraft-pocket-edition/2524-buildcraft-alpha-10-mcpe-10.html)
It requires BlockLauncher and CoreEngine to be installed. I installed BL from the Google Play Store, and downloaded "Core Engine version 1.2 (api level 8)" from for-minecraft.com which, when loaded with BL says "Current MCPE version (220.127.116.11) is not supported by Core Engine and may work unstable and unsave", among many other errors about missing fonts and textures and so on.
Also, the icrender.apk file that is referenced in the BuildCraft install instructions first was only 3kb, then when I redownloaded it at 38kb it still couldn't be loaded with the package installer.
This is all kinds of fubar, but obviously someone has installed this before. The last comments are nearly 8 months old though, which does not give me hope. Does anyone still use BuildCraft for MCPE and have any info on how to install? TIA.