I need bios 1.0 or 1.5.I foud 2.5b but is not good.Thank you for help

Support Information:
Device Type: CD / DVD
Manufacturer: sony
Model: DVD RW DW-U54A
Interface: IDE
Operating System: Windows XP Home
Age of Device: Not specified
FCCID:

Type of drive: dvd-r/cd-rw (dvd burner, dvd reader, & cd burner combo)
Location: internal
What recording software are you using?: Nero/version

Find it on DriverGuide (http://members.driverguide.com/index.php?action=srch&sm=b&aax=&qa6=0&qa5=3&qa7=1500&dp=3&qm0=DVD+RW+DW-U54A&jmd=and&fzz=d) | Find it with Google (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=sony+CD+%2F+DVD+sony+DVD+RW+DW-U54A+Windows+XP+Home+)

1.0 and 1.1 is original firmware these drive models shipped with. Sony never made that original firmware available. They only made the updated 2.5b firmware available for downloading.

http://forum.rpc1.org/dl_firmware.php?download_id=1859

http://esupport.sony.com/US/perl/swu-download.pl?mdl=VGNA190&upd_id=1607&os_id=7