.profile
mkdir /iso
mdconfig -a -t vnode -f /your/iso/image/5.3-RELEASE-i386-disc1.iso -u 0 mount -t cd9660 /dev/md0 /iso
/dev/md0 /iso cd9660 ro,noauto 0 0
mdconfig -a -t vnode -f /your/iso/image/5.3-RELEASE-i386-disc1.iso -u 0 mount /iso