This question may be been asked before, sorry for asking again. How can I copy some of data files to a CD, then left the CD open so I can copy more data into the same CD later on ? For example, today I copy about 100 MB data to it, take out the CD and copy the data to the other PC. Week later, I like to copy another 150 MB data to the same CD. What s/w do I need ???? Thanks you guy/gal.