You probably mean ewavr's universal dumper here:
udumperIt is very convenient - the only 'drawback is that it does not give any feedback.
method:
- format a small (16M - 1G ) card in camera (avoid 2G and bigger)
- apply bootable.exe (in archive) on it (to make your cam recognize it as 'bootable')
- copy 'empty.dum' to the card
- copy one of the 'diskboot.bin' files to the card, choice depends on your cam OS.
if you don't know, you'll have to try them until you succeed.
- write protect (w/ small tab on card) and insert card
- start cam in Review, not picture taking mode
- NOTHING will happen, don't worry, wait ~ 1 minute to be sure
- open battery compartment and remove battery
- remove card
- open 'empty.dum' in your favourite hex editor, if it contains anything apart from binary zeroes, you got it
- otherwise, start again with next 'diskboot.bin'
- to clean up you can remove 0x00's from the beginning of the file & 0xFF's from the tail end.
A VxWorks cam will have 'Copyright 1999-2001 ARM Limited' or similar at the beginning of the dump
In a DryOS cam the first bytes sofar have always been 'gaonisoyP'
hope this can save you from the much more complicated (?) blinking method
good luck & let us know how you get along,
wim
edit: corrected (see ewavr's comment )