My BIOS has multiple USB-Boot-Enablers like USB-FDD, USB-HDD and USB-CD-ROM. Maybe its a simple Emulation internaly, but yes it recognizes the DVD-ROM as a bootable Device and of course, it´s simply booting the DVD with Chameleon. But after booting Chameleon itself, the bootloader does not recognize the external USB-DVD-ROM... that´s bit strange for me...
P.S. Tried to Edit the .plist in the "Extra"-Folder using Win7, but there was no Entry in it... No .plist, nothing... Is it possible to do it from the Chameleon GUI after booting it?