Multiple files in a single download product.

We conduct events consisting of meetings in which there is an opening talk and a period of Q&A. These meetings run for as long as two hours, and the resulting mp3 files are pretty large. In some cases, these events might include more than one meeting over more than one day, and we would like to sell the mp3 recordings of these events on our site. Obviously, requiring the buyer to commit to a single download that might include three or four such recordings is out of the question. My question is: can we use eCart and whatever other extensions that might be needed to sell as single product multiple mp3 files so that the buyer can download them one at a time?