yeah im trying to do that im using the sdm...~~ cos im using a 8gb card
I'd recommend the following steps :
1) Format your 8G card as FAT32 (you should be able to do that in the camera - just check to make sure its FAT32 and not exFAT).
2) Use EOScard to make the SD card bootable :
http://chdk.wikia.com/wiki/EOScard3) Unzip the CHDK distribution to the SD card.
4) Lock the SD card, insert in camera and start camera.