[CentOS] Install CentOS from a floppy disk

Hi,

I'm trying to install CentOS 4.5 in a PIII.

Problem is the computer doesn't boot by the CD-ROM drive and when I try 
to access the BIOS to change the settings, the machine goes bezerk :(

Is it possible to start the install through a floppy and then continue 
the rest of the install process with the CDs ?

If so, how ?

Any help would be appreciated.

Warm regards,
-- 
:wq! Mário Gamito