I formated my SD in FAT32 using my own camera. The problem is that I tried using the STICK to format the SD but it didn't work. Probably my Windows can't support this program. But I already formated that and I used it to update another firmware just to see if it worked, and in fact it did.
As zeno says in the previous post, finding out how to get STICK working is the best thing to do.
While he mentions installing Java, it seems from your first post that you were able to get STICK running and downloading the S100 CHDK file ? So you probably have Java & STICK installed correctly. Please give us more details and information about what did not work when you tried to use STICK?
There are other options you can use here - see below. But first you need to read this and understand the difference between the
link> Firmware Update Method and the
link> Bootable SD Card Method.Sadly I have the DISKBOOT.bin and it still didn't worked at all. Here is a pic of it: http://i.imgur.com/0oSHaoc.jpg . I did the processes needed to to use the camera and looked for the option to update the firmware in the camera, when people said it would be there, but it wasn't.
That's is because, as I told you in my first post, the
Firmware Update Method of loading CHDK does not work with the S100. You need to use the
Bootable SD Card Method. That is why you need to read the links I just posted and understand how the two different methods of loading CHDK work.
I didn't use the STICK. I used the camera to format it. I'm wondering if it changed the whole thing. Going to look a little about that. See if by doing everything again and it may work.
As zeno told you, you need to have a card with the special BOOTDISK string in the header of the SD card. This can be created many ways.
The easiest is STICK.
Or you can use this utility :
EOScard.
Or try any of these methods :
http://chdk.wikia.com/wiki/Prepare_your_SD_card#Windows Or if you still have the SX230 available
and you have an SD Card that is 4G or smaller , you can use it to create a card that will load CHDK. For this process only, you need to format that card as FAT16 and then install CHDK for the SX230 on the card. Load CHDK and go to the CHDK
Miscellaneous Stuff menu and then the
SD Card menu. Select the
Make Card Bootable .... menu option. This will configure the card to be bootable. In your PC, delete all the SX230 stuff from the SD card and unzip the S100 file to the card againwith full directory structure.
Put the little SD card lock switch into the
LOCK position, start your camera and look for the CHDK logo.
Thanks for linking them, but I already saw them and it didn't change much. I installed and even did with another camera SX230 and it worked. I can't understand why it is not working with the S100.
The SX230 camera will allow you to start CHDK with either the
Firmware Update Method or the
Bootable SD Card Method..
The S100 will only start CHDK with the
Bootable SD Card Method. 
