Any updates on this?
I have a Cendyne external 52x24x52 CDRW, which is identified in Nero InfoTool as "CRW 5224A", with firmware 1.20. Would not flash when using the native USB 2.0 wiring hookup. Have removed the drive from the external case and attached it via IDE connector, for flashing purposes. Neither MKTFlash, nor any of the ASUS flashing tools, can work. MKTFlash won't recognize the memory type. The ASUS flash won't work, due to the missing name of "Asus" in the drive identifier.