Yep, that would work. I'm currently working on getting the jukebox running. Then you could just put the music as OGG/Vorbis, mp3 or Wave into a directory and specify it in the settings.
Maybe you already noticed the choppy sound when many sounds are played at the same time (For example when the reactor explodes). Not sure if this is caused by SDL_mixer or D1X-Rebirth itself but playing music in the background will cause even more problems here :/

If you want to get any help you should provide more information XD
Wait... you've written here earlier that you're using the leaked PR 1.2 firmware and should know that it got some dependency-problems with the OpenGL ES packages.
Not sure what you expect now... you shouldn't install unreleased firmware on your phone and expect that everything is working without any problems. I won't add any workarounds for the bugs in the leaked PR 1.2 or provide any support for this package on PR 1.2 until it's officially released.
But since it's open source you're free to add a workaround yourself, the source of the package is available on the garage-page too.