firmeware estudio 452 + new idea

[iust]

I have two set estudio 452. on of them hdd defected and need firmware . I dont have programs and requirments. I decided copy info from hard of safe set to new hard by slave master method in xp os.( this way solve my same quation on e350 ).(I understand that must reformat safe hdd 690 code. ( ITS IMPORTANT WHEN CHANGE THE HDD WHIT ANOTHER .THIS FAILED MACHIN WORKS FINLY.
is it a funny idea?
is there risk to do it?