Anyone mod my BIOS to add RAM divider?

[ckp64]

Hi, I have an MSI PT880 LSR (ms-7008), and I was wondering if anyone has experience with bios modding and could add more FSB:RAM ratio dividers options into my bios.

Currently, using my 2.4A/533mhz fsb/ 1MB L2 cache CPU,

My only divider options are FSB:RAM.. 1:1 (ddr266), 4:5 (ddr333), 2:3 (ddr400), ddr433, ddr466, and ddr500.

I want an option of 5:4 or atleast 3:2, so I can run my RAM frequency lower than my FSB. (These ratios are all FSB:RAM)

Is it possible to add a divider in this scenario?

Thanks.

My BIOS:
http://rapidshare.de/files/14122430/A7008VMS.190.html
(ask me to upload somewhere else if rapidshare is not good)

CPU-Z screenshot:

[ckp64]

anyone..?