How to extract iso system recovery disk

This is probably very simple but I have just migrated to WIndows 7 and installed Ghost 15.   So far so good.  I have successfully created a new recovery point and can access the old recovery points from the previous system to recover data.  However, I'm not sure what I have to do to burn the contents of the recovery disk .iso that I downloaded so I can create a new one.  I would welcome any suggestions.   Thanks.