You can grab the image here.
Just uncompress the image (with unxz or similar), stick it on a usb stick containing a joggler bootable GNU/Linux distro and copy to the mmc:
mmc instructions:
first check the md5 of the uncompressed image(squeeze-11-04.image):
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md5sum squeeze-11-04.image
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14a309f6e6e4fc4547aa4087d95334b0
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dd if=squeeze-11-04.image of=/dev/mmcblk0

usb instructions
uncompress with 7zip or unxz
burn uncompressed image to usb key with dd or win32diskimager
Edit: as pointed out by gadget_hunter you can also put this on a usb stick.