Nautilus DVD Burning -- Simple but Elusive -- Please help

[Benjamin Sher <delphi123 zebra net>]

Dear friends:

Using PCLINUXOS with both KDE and Gnome and Nautilus 2.10.1

I've been trying to burn a DVD using Nautilus CD Burning. It looks so 
simple, yet I can't seem past second base. Here are two screenshots:

http://www.websher.net/tmp/nautilus-DVD1.png
http://www.websher.net/tmp/nautilus-DVD2.png

My current desktop is KDE. So, my first question is: do you have to use 
the Nautilus CD Burning from within Gnome? I could do that, of course, 
if necessary. PCLINUXOS includes the Gnome Control Center and of course 
I use a lot of Gnome applications within KDE.

I have looked at the various step-by-step instructions for Nautilus CD 
Burning. This is why I am so mystified. I have some serious experience 
running Linux, yet I can't for the life of me figure what I am doing 
wrong. The files in question (see screenshot) were created by K9Copy, 
i.e. they were decrypted, copied, compressed and were made ready for 
burning. The real total size of the files (due to compression) is 4.3 GB 
(instead of 7.1 GB). See screenshot 3:

http://www.websher.net/tmp/nautilus-DVD3.png

I would really appreciate someone's help. This has got to be a lot 
easier than it looks.

Thank you so much.

Benjamin