If you have a way to get the sound files...
You will need a piece of sound modification software - like Audacity (google search it's free) - so you can work with WAV files.
You will also need the older version - V2.X - of the obsidian launcher which includes a converter to change WAV's to the right format for the Obsidian board.
More specific then that I can't help you, but other members will be able to.
Oh yeah... if your saber is fairly new you will need the new version of the launcher in order to put the sounds on the board - so Both versions.... and there's a catch to running both which is fairly well documented.
Here is a tutorial that can help get you started on creating and setting wav files so that they convert to LSU. Ask any questions that pop up, but it's fairly simple once you get the hang of the interface.