how can i add hard disk driever at installation

[kin boster <kinboster@gmail.com>]

hi all:
       I have a new hardware, a hard disk, the lenny installer can't driver it, i have this hard disk driver module, 
how can i add this driver modules in installation? i don't want add it in initrd. it too sucks.is that any documentation mention it?

best regards.

boster