Please help me? ASUSTeK Computer INC. P5B-VM Rev 1.xx

I know this is not the board i want.
because i want to go with ati cross fire.
But thats going to be a month or two down the road
this is what i have

Board: ASUSTeK Computer INC. P5B-VM Rev 1.xx
Bus Clock: 286 megahertz
BIOS: American Megatrends Inc. 1001 07/25/2007

2.55 gigahertz Intel Core 2 Duo
64 kilobyte primary memory cache
4096 kilobyte secondary memory cache

it's a 2.4 but all i can get out of it it's 2.55 im new to this never done this just messing with the bios i got it to do that. maybe im missing something some other setting im not doing = standar is 266 or 260 i dont remenber but i can only bump it 2 or 4 at time. when i go over 286 it wont take it i have to go back to standar setting and start all over againg.

Does Anyone else have this board and can guide me on how to take it a lil bit higher?

i'll buy you dinner
j/k thanks for your help i so want to learn all thsi stuff thanks.

And by the way if you can advice on a board that will be able to handle cross fire let me know.
or sli it's something im looking into doing.
Rico