boot/install problems

[delirium <delirium sinnerz com>]

i'm trying to install redhat 5.1 on my 486dx2-50mhz ps/1, with 44 megs
ram, etc. i boot from a floppy, i hit enter to install, and it says
"loading initrd.img..." and it just sits there. the disk drive light
stays on. any ideas on why this is happening? i know there's nothing
wrong with the boot disk, because it works on other machines (and i've
remade it about 5 times).. are there any hardware parameters i need to
pass onto the kernel? help!