I have installed Red Hat 9 and it won't boot up, what I get is:

"kmod: failed to exec /sbin/modprobe -s -k block-major-8, errno =2
VFS: Cannot open root device "sdb5" or 08:15
Please append a correct "root=" boot option
Kernel Panic: VFS: Unable to mount root fs on 08:15"

I created a boot disk at installation and that is what I am trying to boot with.

If it is needed to be known, I put the "/" and "swap" partitions on an external usb Maxtor hard drive. Also, when I went to install Red Hat, it only recognized the external drive and it didn't recognize the drive that came with the computer.
I have no problems booting to windows xp, it is just Linux that won't start.