Downgrade a TEAC CD-R58S
 

How can I downgrade a TEAC CD-R 58S to a M or N Version ???
I tryed the Firmware Tools from Teac and a Dos Tool, but there was no way to change the Firmware !!

Can it be, that i have to burn the Eprom ??
Or is there another way ( i hope so.... ) ???

Please post me your experiances