WEIRD MOBO PROBLEM!!! HELP!!

hi
on one of my freind's system which has a celeron533mhz the MOBO is of "AUTO JUMPER SERIES" now i came about it for the first time...the thing is there are absoulutely NO JUMPERS on the mobo all is autodetected from BIOS the BIOS is AMI HIFLEX ...
NOW THE PROBLEM:
the problem is the bios is messed up and i need it to reset the bios now there is NO jumper so how am i supposed to clear the CMOS??? i tried to take out the battery for few secs and put it back but no use the comp doesn boot up atall!! so i need to clear the CMOS how shall i do that... PLZ HELP
thanx

THE MAIN CAUSE FOR GLOBAL WARMING- MY KICK ASS ATHLON XP