Support for SIIG PCI IDE - Ultra DMA 66 / HPT366 chipset

I've been trying to install 7.0 on a Micron PC with the SIIG controller with
the Highpoint Technologies chip set - HPT366. I have discovered that 7.0
does not support this controller. While I found a driver on the net for
kernel in 7.0, I'm looking for an easier and simpler approach.

I purchased 7.0 Deluxe Workstation version this as a retail box set several
months ago. It's never been registered with Red Hat. I just never got around
to installing this version. (I've been busy patching my Window's systems ...
humor intended) How can I easily upgrade to 7.3 or 8.0 without downloading
the ISOs from the web site? I'm on a dial-up connection. So, this is not a
realistic option. Do I have buy a complete boxed set again? I understand
this version supports the controller and chipset. I would like to purchase
the CDs. What are my options?

Thanks.

John