I think the person means "Packet Writing". Now I am very hazy on the subject, but basically you can drag individual files over and it burns them on the fly, and also you can delete files [as it says below] but not get the space back. Check out: http://packet-cd.sourceforge.net/ To quote from the page: "Packet writing is a method quite different from TAO and DAO; it is designed for writing data to CD in small increments. Packet writing must be supported by hardware (not all CD writers support packet writing). The largest benefit in packet writing comes in its ease of use; packet writing enables the user to copy files to CD without mastering any images previously, allowing someone to copy files to CD without requiring significant technical knowledge. Combined with a CD-RW drive and CD-RW media, packet writing provides an extremely simple, versatile, and inexpensive method for performing regular backup of crucial data. " Hope this helps! -- Jon Jeffels aka Purple Tiger Homepage a long way off...