Installing 6.1 on a NCR3435

[James Call <james laplaya com mx>]

I Just got a NCR3435 and I want to install Redhat 6.1 on it.  It has 256mb
of memory and 5 - 2 gig hard drives in a RAID array and 6 -p166 cpus.  It
is a Microchannel 
machine with all things SCSI.  I have a toshiba CDROM on it.  The main
Problem that I have is that there is only about 500k of low memory
available.  When I try to boot from the boot-install disk, I get a warning
that I don't have enough memory.  How can I work around this?? Any Ideas
would be appreciated.  Thanks, James