kent@cow:~$ sudo fdisk -l

Disk /dev/sda: 750.1 GB, 750156374016 bytes
255 heads, 63 sectors/track, 91201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x000b8508

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           5       90872   729929303+  83  Linux
/dev/sda2           90873       91201     2642692+   5  Extended
/dev/sda5           90873       91201     2642661   82  Linux swap / Solaris

dd if=/dev/sda of=image750.img

losetup --partscan --find --show disk.img

mount /dev/loop0p1 /mnt

losetup -d /dev/loop0

sudo kpartx -a image750.img
sudo mount /dev/mapper/loop1p1 /mount/point -o loop,ro

mount -o loop,offset=2560 -t auto /path/to/image.dd /mount/point

$ los my.img
/dev/loop0
/mnt/loop0p1
/mnt/loop0p2

$ ls /mnt/loop0p1
/whatever
/files
/youhave
/there

$ sudo losetup -l
NAME       SIZELIMIT OFFSET AUTOCLEAR RO BACK-FILE                                                                                      DIO
/dev/loop1         0      0         0  0 /full/path/to/my.img

$ # Cleanup.
$ losd 0
$ ls /mnt/loop0p1
$ ls /dev | grep loop0
loop0

los() (
  img="$1"
  dev="$(sudo losetup --show -f -P "$img")"
  echo "$dev"
  for part in "$dev"?*; do
    if [ "$part" = "${dev}p*" ]; then
      part="${dev}"
    fi
    dst="/mnt/$(basename "$part")"
    echo "$dst"
    sudo mkdir -p "$dst"
    sudo mount "$part" "$dst"
  done
)
losd() (
  dev="/dev/loop$1"
  for part in "$dev"?*; do
    if [ "$part" = "${dev}p*" ]; then
      part="${dev}"
    fi
    dst="/mnt/$(basename "$part")"
    sudo umount "$dst"
  done
  sudo losetup -d "$dev"
)

cat /sys/module/loop/parameters/max_part

options loop max_part=31

GRUB_CMDLINE_LINUX="loop.max_part=31"

sudo losetup -f --show my.img

sudo mkdir /path/to/dir/
mount -o loop example.img /path/to/dir/