Mandrake again, I128 where?

[cal herrmann]

I don't get to work on this steadily, but have finally found out that the 
driver I need for my video card (Number Nine Revolution IV) is I128 or i128, 
but, since without it I can't run the screen, from the command-line I can 
call out "harddrake"  and I have also tried changing XF86Config (with vi), 
but neither way can it find the driver!  And neither gives me a clue where it 
is!  Where are these drivers kept?  Or is it still on the CD?
Thanks, Cal