i am new to nero and it came with my nec1100a dvd+r/rw burner . when i create a data disk, for backing up my files ,it creates what it is calling a iso1_DVD file ani noticed clicking on this it is like a saved session so i can add later files. is this the only way to add data back to the disk? what if you loose the iso file ? because now something has happened.............grrrrrrrrrrrr..... i click on the iso1_DVD file ,witht he disk in and it opens nero,then ,i see the added file (that is great idea i do not have to search for it lol) but when i go to brn it now says i have to insert the media that is associated with this file to add data (basically that is what it says ) but , it is in there now i cannot figure out how to add data to it any helpers??????????????~