Hi Oakley 28, It stands for Direct-Access-Archive which is a file i have had this once and if you used google it will tell you. You need to download powerISO which is available at this link: http://www.shareup.com/downloading-37764.html It will start to download when you open the page once you have downloaded it and installed just open the file with powerISO and you can do what you need to from there i hope this has helped