Ok, So I have soldered on some pins. If you look inside your Conductor or Composer, there is the firmware chip (8 pin) that should be socketed on the left side of the mainboard. Right behind that, there is a 5 pin header, on Conductor, the header is not there, but you can see where it is suppose to be, on a Composer, it should already be there, (maybe less than 5 pins) but, none the less, the pin outputs are as follows.
starting from the front of board to the back.
pin 1 = ground
pin 2 = 5.00v
pin 3 = 3.3v
pin 4 = 3.3v
pin 5 = 3.3v
To remove the mainboard and solder on the pins, you will obviously need to get some pins from an electronics store, and a T10 Torx wrench to remove the 4 screws that hold the board into the system. Exercise caution and ESD prevention when removing your board.
On the photos i have posted, you can see that there are 2 wires connected (a black one, a red one). I think this is the 5 volt supply to the bridge boards that convert 1394a into IDE/Atapi. The bridgeboards usually have a 5 volt input to be able to supply power to devices connected the firewire ports, and there usually is a seperate power connector for the bridge board itself. Usually like the kind of power connector you connect to a 3 1/2" floppy drive. Can anyone confirm this?
As far as the cable to control the robotic unit, it is a standard RS232 cable, not Null Modem.
You can get the codes from the other thread to see which version of the firmware you have.