multi session
To do a multi session burn in finder you need to
put all the stuff you want to burn into a directory and then load up disk utility. Now go imges->new->image from folder. Go to the folder that has all the stuff you want to burn and select open.Now give the image name and save. When this is sorted click burn icon in the toolbar of disk utilit. Then navigate to the directory that has your disk image in and select burn. In the resulting burn dialog box click the blue triangle button in the top right and then turn on the option leave disc appendable. now click burn. With this completed to you can add more stuff to your disc by following the same method. Each time you use a new session on the disc you will get a cd icon in finder for each one. I hope this helps.