There are three mp3 files you can either play in your browser or download and play on your mp3 player of choice. First there is a guided posture audio file. Then there is one on meditating while watching the breath and another on meditating using a physical object. You can use these last two as guided meditations, they help you through the first 5 minutes and then the rest is up to you!
Get them here. And staaaaart meditating.