Matsushita UJ-845B my lovely slot-in burner, which is recognized by everything and boots into OS 9 and OS X (with "C") and the Pismo "sees" a UJ-845S
I did a new assembling last night using a supernumerary Pismo DVD-Rom module:
this time it‘s a Matsushita
UJ-845-C slot-in burner from a Windows laptop with faceplate. Mac OS X and OS 9 "see" this module as UJ-845-
D. [:O] ]'>
H/W=01 FW=D100 - same as my UJ-845B (S), but this time a got a
SLAVE module and so it could‘t boot with the "
C" key (emergency boot), but only via Startup-Disk panel etc.

Firmware is okay, but it's a pain in the a** to alter the firmware 2 times on a Windows laptop, until I would get a UJ-845-S Master.
So I took the short way, using the soldering trick from
http://www.sterpin.net/uk/dvd8pismouk.htm
This forces the CD/DVD-ROM from slave to master.
So I've gotten what I wanted (sorry some german text, but the important text parts are unique):
[8D]