Thanks for the advice. I've already done it with several SD cards.
What do you mean by using a Windows box? Does it mean gparted disk format
tool of GUI Linux?
I used mk-mmc script downloaded from rowboat download site;
http://code.google.com/p/rowboat/downloads/list.
Partitioning, formatting of S
Appears that your MMC is in bad shape.
Try reformatting the card. If you still get the errors, try a
different card. If you are using Linux, I found that using a Windows
box to format it initially worked for me, then used 'fdisk' on my
Linux machine to format again as mmcblk0p1=fat and mmcblk0p2
