I have installed a number of distros without using a CD or floppy, and not doing any kind of net booting. What I did was to remove the harddrive and put it into another machine (or use one of those USB-->IDE adapters... they're great!). Completely erase it and put a partition just larger than the install CD and mark that partition bootable. Bear in mind that if you're doing this with RH9 you will only be able to use CD1. Then use
dd to copy the ISO file into the partition. Put the drive back into the box and reboot. With any luck your computer will see that you have a bootable partition, try to load it, see that it is really a CD and boot from it anyway. At least it worked for me