New iso format on 9.0

[egoitz at ramattack.net]

Good morning,

Previously I was doing a : 'tar -C /expert/netboot/freebsd8 -pxvf 
8.0-RELEASE-amd64-disc1.iso' for extracting iso files. Now due to a 
different way of creating iso files in this new release... have read 
this is not recommended and in fact it does not work pretty good. The 
matter because I wanted to make this extraction is for an unattended 
installation system of FreeBSD (Jumpstart basically) so I need a 
consistent way of extracting it, preserving the most properties of the 
iso files content. So, could anyone advice me a proper way of doing what 
I was doing before, with the new iso files?.

Best regards,