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>>Checking Media Presence......
>>Media Present......
Downloading NBP file...
More info about boot and boot order:
'PXE Reboot' and 'Reboot' from MrP change boot order for the next boot. They only change it once, and the changes are temporary. Boot order set in BIOS wouldn't be touched.
Debian/CentOS installer will add a new boot entry called debian/centos on the top of the BIOS boot entries.
Soft reboot from OS or 'Power on' doesn't change boot order, it will boot whatever is on the top your boot entries set in BIOS.