How to install
Just thought I'd post this for anyone still having a hard time installing.
Once you install the apk to your phone you should be able to run it then hit menu then tools, you should see an option to download the files here.
If this fails you just need to get the pak0.pak file from quake 2, demo or full and put this file in sdcard/baseq2/
To get the pak file you can install either full or demo quake 2 and copy them from the baseq2 folder.
I hope this helps anyone still having a hard time installing.