There seems to be only two companies that understand the JTEC PCM and what happens inside the magic box. This wiki is intended to be a place where the open source community can come and contribute their findings on the JTEC PCM and reverse engineer it so definition files can be created for EcuFlash, Romraider, etc.
Also what good is it to be able to edit a PCM file if there is no way to read or write to the PCM? Another goal is to be able to read and write to the PCM without the need of any expensive boxes. Maybe it can't be done with only a PC, but I believe it can.