"Please make sure you have InCD installed, if not you can download it from the Nero download page-click here package-3
when finished installing InCD reboot the p.c.. Once the system is backup open the Nero StartStart and select your Disk type at the top of the StartSmart and choose DVD then proceed to the 'Data' Category and select
your Task-'Format/PrePare RW DVD' and place your DVD in the drive and click
on Start to format the RW DVD. Once the Format is complete close the InCD
program as well as the Nero StartSmart. The Format process creates a UDF file system on the DVD-RW disk which allows you use the DVD-RW like a floppy disk, just open 'My Computer' or the 'Windows Explorer' program to drag and drop your files directly to the recorder. Example: lets say you copied
5 folders to the DVD-RW disk and no longer need a certain folder, just right click on the folder and select delete to remove that one folder from the DVD, this make the process alot easier than using Nero Burning Rom and going through the erase option which erases all data from the disk and burning files over again."
Extracted from click here