Error13 Invalid or Unsupported Executable format

Trying to install Solaris 10 on my PC and get the above message from Grub.

Grub starts up and I pick Solaris as the install option, I then get the error message as above..

on checking the command it shows

kernel /boot/multiboot kernel/unix -B install_media=cdrom

I'm using the DVD iso image.

I can view the DVD from Windows XP Pro

My system

AMD Athlon +3200 with 1Gb Memory

Nvidea Nforce 2 chipsets on Gigabyte Ga7NNXP motherboard.

Video is Nvidea GeForce FX5700Le (256MB)

Installing on to 2 x 80Gb Maxtor PATA Disks, last used on a windows system, do these need to be reformatted ? How ?

[656 byte] By [PeteDysona] at [2007-11-26 19:08:26]