PS3 CAN I REDUCE CECHA00 TO OFW1.00?

[CECHA]

CAN I REDUCE CECHA00 TO OFW1.00?
like the retro 1.00 system.

 

[Sorrow]

I did this before years ago with 2.40. Download ofw and QA toggle the ps3 modify the ofw to have cfw syscalls then install the 1.00 ofw over 1.00 cfw. Not sure if this would work on a firmware as old as 1.00.