Bios Mods -The Best BIOS Update and Modification Source

Hi I am trying to unlock my Asus N50Vn Bios to access advanced features for tweaking and overclocking.

The CPU is an Intel Core 2 Duo P8600
The chipset is Intel PM45 Express
The current Bios version is 212
(64-0100-000001-00101111-102809-Cantiga-N5V00212-Y2KC)
and can be dowloaded from:
http://dlcdnet.asus.com/pub/ASUS/nb/N50V...nAs212.zip

I am willing to test custom Bioses and/or follow instructions to unlock it myself if no actual unlocks are already available.

Any help or guidance will be appreciated.
Thanks

There are no options to unhide, sorry.

Is there a possibility to use a custom version, I am willing to try ..