I can help with the sound files question. Yes, you can include them in the sis file using simplesis from Ensymble.
It is very important that you read the instructions on the Ensymble site. After that, if you're a bit confused, here's how to make a sis of a folder (I'm not at my computer right now, so I'm going to write this from memory. I apologize if it's not exacly accurate):
1)Create the folder hierarchy exactly as you want it to be installed on your phone (remember to include the audio files in one of the folders)
I imagine it would look something like this:
2)In the command prompt, type:
I mentioned --drive=C so that you would always know where the files are, instead of having to check if they are on phone memory or memory card.
python ensymble.py simplesis --drive=C --verbose myappfolder myappfolder.sis
Hope that helps