Thanks for the answer Fe50. in fact I try with a 4GB and every thing is working.
So my new question is : how can it work on a 32GB ? I try this (found on the user guide) :
1)This option creates a 2 MB FAT partition on the card, that's fixed on the code for now. You need to
copy the CHDK firmware extensions to this partition and load them.
step one works.
2)Then select "make card bootable"
in "Miscellaneous stuff", so it does not complain when you write-protect the card.
Next step is to select "swap partitions" on "Miscellaneous stuff", this will hide this small partition and
make the big FAT32 one visible.
step 2 woks but if I try the card again
sx10 doesn't offer firmware update neither autoload boot (with card locked). so 2mb is no more visible. may I format the second partition with the camera or with the cardtricks ??
3) We need to format it, and copy CHKD firmware extensions to it too,
so we can perform "swap partitions" again. So format it in FAT32, copy CHDK, insert it on the camera
ad load CHDK. Select "swap partitions" and "make card bootable", write-protect (lock) the card and
power-cycle the camera.
this step doesn't work because when all it's done formated in fat32 it's not bootable and firmware update not available too...
4)It should now load CHDK from the small 2 MB partition, but have access to the big FAT32 partition
did not reach to this step
It doesn't work for me or I'm doing something wrong !
Thanks again for being so patient and for doing such a great job guys.
good night