You can use Skype on Windows with a program called Pamela Call Recorder (http://www.pamela-systems.com/). You may have to spend $5-$10 to get Skype credits to make a call to your home phone, but of course it will be absolutely worth it and should be a very straightforward procedure. Pamela saves in the MP3 format - just use Skype to call your home number, have Pamela set to record your calls and then let it play through the messages you want to record.

Hope this helps.