The build that I downloaded did include a PS.FI2 file, and I did copy that. I guess its possible something is wrong with it-- I didn't modify it at all, I just copied it onto my camera when the instructions said to. Since I have a mac, I followed the installation instructions at
http://chdk.wikia.com/wiki/FAQ/Mac#SD_Card_.E2.89.A44GB and they do say to copy that file along with copying the rest of the CHDK folder.
For the 4 gig card, I've tried all possible combinations of starting in play/shoot mode with the card locked/unlocked and scrolling through all menus. The Firm Update option just isn't there. There was another thread before (
http://chdk.setepontos.com/index.php/topic,3534.msg33119.html#msg33119) where I asked about this and eventually I just gave up and said I'd use the autoboot method, which I'm happy with now.
But, I still would like to figure out how to use the 8 gig card.
This method is the same for any size partition, by the way: PS.FI2 in the root and start in playback/review mode.
I guess you mean the method for starting with firm update? What I was trying to figure out is the whole method for installation on an 8 gig card. Again I was following the Mac FAQ, and the applescript on that page didn't work for me, so I had to do the manual installation. It involves using Terminal code to modify the boot sector of the card, and since I don't really know what I'm doing with Terminal code, I just followed the directions to the letter. They worked for my 4 gig card but they don't work for a larger card and I don't know how to modify them.
EDIT: Ok, I don't know what to do with this message board code. When I first pasted in the urls with the standard BBC bracket code, they didn't work. Then when I just copied and pasted the urls by themselves, they made links with the title of the target page (although they did not let me choose the text of the link). That seemed to work fine. But then when I fixed the quote code at the bottom, they went back to just showing urls! I don't understand how that could have affected lines in the message above it. So I'm sorry for the messy links.