install RHEL4.2 doesn't recognize RAID controller

[mailinglists]

Hello,

I need to install a RHEL4.2 on a DELL PE1950, with 2 Seagate SAS 
(Cheetah 15K.5 ST373455SS) hard drives and a LSI corporation Perc 6/i FW 
package 6.1.1-0047 RAID controller (RAID 1).
The first redhat install disc doesn't find any hard drive, so it asks me 
to give a driver disk, or to chose a driver.

I have tried to insert different disks containing dowloaded drivers from 
support.dell.com,but they are not recognized (nothing happens when I 
insert the disk, I have to select back to go to the next step...).
I have tried to choose the megaraid_sas and ata_piix drivers which are 
propsed on a list, but it doesn't work either.

So could anyone give me a method to make a driver disk (I found a lot of 
tutorials to make floppy drivers disks, but I have no floppy drive on my 
PE1950!!) ?

Or where can I find ready to grave images ? Or installation disks whith 
extended drivers, Or anything else, what lets me install my RHEL4.2 on 
my DELL-PE1950 !
(Just for information, I need RHEL4.2 for a softwre editor which can 
only run on this version...)

Thank you very much for your help,

Laetitia