Bios Mods - The Best BIOS Update and Modification Source

Dear Sir's,
                   I want to change FUJITSU SIEMENS mainboard serial number from whatever to ..CN697029CO0074.
the dots are inclusive.
I want to make this change to run original software which is locked on old main board of dell system on new FUJITSU SIEMENS system.
The bios can be downloaded from
http://support.ts.fujitsu.com/content/Qu...&btnG.y=12
the main board details are
Mainboard Manufacturer:    FUJITSU SIEMENS
Mainboard Name: D2156-S2
Mainboard Version: S26361-D2156-S2
Mainboard Serial Number:29500483


The bios details are

FUJITSU SIEMENS // Phoenix Technologies Ltd.
BIOS Version:5.00 R1.03-04.2156.S2
BIOS Release Date:12/04/2008
BIOS Start Segment:E776
BIOS Size:512 KBytes
System BIOS Version:1.3

Please help me at your possiblest convenience.