Are we perhaps into questions of EIDE bus conflict? Hard disk, CD reader and CD-Writer on the same side (Primary) and as Slaves? I've read somewhere on the PSX forum that the CD-Writer should be the Master on the Secondary side or at least not on the same side as the Hard Disk -, or something like that.

The burning programs calibrate themselves and the question is more critical with discerning software (Easy CD Creator is really simplex")