I've tried this with AFT 1.3.2 and (because AFT said it was out of date) with AFT 1.3.3
I have a CDV300S. Firmware version from menus is listed as v0.4.8. I used the following to pull what I believe to be a good backup of the firmware:
firmfl gen 6 bst bld hal pri rom dsp d:\backup.bin >...