Unable to install Vista on Asrock 939NF4G-SATA2 Board - Help!

I have just about given up now trying to install this Vista thing!
I could install it no problem on my Mrs's pc ( which is an old pc ),
where as mine it always freezes on 'Expanding Files'.
Sometime at 1%, 4%, 6%, 7% and 8%. What the hell is going on?
My system is all newish parts as follows...

AMD 3000+ 64bit 939 CPU.
Asrock 939NF4G-SATA2 Motherboard.
NVidia 256Mb Gfx card.
600Gb of Hard Drives.
Pioneer 111D DVD-RW Drive.
Samsung DVD-Rom Drive.
1Gb (2x512Mb) Kingston DDR400 Memory.

My Mrs's pc which it DID install on is as follows...

AMD 2000+ XP CPU.
Asus AV600 Board.
NVidia 256Mb Gfx card.
80Gb of Hard Drive.
Pioneer 109 DVD-RW Drive. (Which is about knackered!!)
512Mb Generic DDR333 Memory.

No help on the Asrock Site as far as I can see. They of course promote
another board of a similar name which they like to boast Windows Vista
capable. They don't put mine under that catagory!! :-(
I have tried so many things to install Vista it's unreal. Burned 4
different dvd disks. DVD-R/DVD+R/DVD+RW etc.etc. I have turned off
things in the Bios which I thought might affect it. I even attached my
Mrs's dvd-rw drive to mine just in case both my drives were no good!!
Nothing doing.

If it happens that this means I have to purchase another board to run
this OS, then I dread to see what bad headlines there is going to be
come January next year. As there are going to be thousands of people in
the same boat as me that will have spent their hard earned money on a
copy of Vista, only to find that they are unable to install it!

NOT GOOD.

Anyone got any ideas at all?

TIA.