This method is not working with the latest mmc firmware file. Also it should have three partitions and maybe you need to have an offset value.

I get a "Mac OS" folder and autorun.inf file. In the folder there are 0kb files named like: Documents Images Sounds Videos.

But there should be a vfat partition which gets mounted to mydocs and a ext3 partition which gets mounted on home and a swap partition.

Maybe you could mount them with a offset value but the first partition looks like some informations about usb storage?

In principle when this information part would be not there, the offsets for the 3 partitions are:

fat32: 32768
ext3: 28995256320
linux-swap(v1): 31142739968

0xFFFF reports blocksize for ext3 is 2048 and for the swap it is 768

With parted you can't see a partition table in the file and with the offset values I can't mount something. I don't have a clue maybe someone else?