Need to unlock Phoenix BIOS R0083N0 for Sony VAIO VGN-SZ230P

Please help unlock the Phoenix BIOS R0083N0 for Sony VAIO VGN-SZ230P. Here is the download link for this BIOS ...

http://esupport.sony.com/US/p/swu-downlo...roup_id=13

Many thanks in advance!