Gateway DX4720 installation problems

[Charles Landau]

I just bought a DX4720-03 from Gateway. Has anyone succeeded in 
installing Fedora on this system?

When I boot off the Fedora 10 full distribution DVD, at the first 
screen, "Welcome to Fedora 10!", I tell it to Install or upgrade, and 
then I get a variety of errors on the text console, including:

    ata1.00 failed to IDENTIFY

and

    PNP: PS/2 appears to have AUX port disabled ...

and

    ehci_hcd 0000:00:04.1: Unlink after no_IRQ? Controller is probably 
using the wrong IRQ.

and

    ohci_hcd 0000:00:04.0: Unlink after no_IRQ? Controller is probably 
using the wrong IRQ.

after which it does nothing.

This system's processor is an Intel Pentium Dual-Core E5200 which I 
believe is 64-bit. I tried both the i386 and x86_64 distributions with 
the same results.

I also tried booting the Fedora 8 full distribution DVD. This works a 
little better; it gets to the first screen of the installation program 
"To begin testing the media ...", but then fails to respond to keyboard 
input.

It runs Windows fine, which suggests the hardware is OK.
It has a PS/2 keyboard and USB mouse.
I get the same results if I substitute a USB keyboard.

Help!