I love very much the Nero function that allow you to upgrade a data CD simply inserting it and launching the program before starting the burning phase. Is there something similar in Linux?
That's what I mean: I've created a multisession data CD (as important files backup) with gtoaster, now in the hard disk directories that I have copied to CD there are new files and I would like to add these files to the CD in the right directories without choosing them one by one (like in Nero), but if I try to open the CD tree with gtoaster or xcdroast I can only see that ther is a track recorded, without any folders tree (the CD is well burned, it works). So neither I can automatically upgrade the CD as I wanted nor I can manually add the new files: my only choice is to copy again the whole directories, doubling the used space and the files on the CD...
Is ti possible to do what I hope?

Thanks in advance.

I'm sorry, I was still sleeping when I wrote the previous post: I wrote several times "ugrade " instead of "update"...
Anyway, I solved the first half of the problem: now I can see the multisession CD directories in gtoaster, so I can manually update it: the cause was a strange (for me, a ...) value in gtoaster mountpoint option, egexp, instead of /mnt/cdrom1...

Now I'm still asking you for the second problem, the possibility of an automatic update like in Nero: is it possible?