Hello & welcome, larouchj !
Hello! i'm trying to install chdk on my powershot s2 Is but after following all the instructions, i cannot get the firm update option in the menu, while i am in playback mode.... so it is impossible for me to load chdk.
You haven't stored the needed files correctly on your SD card...
Use
Cardtricks:
Click
Download and store the 'complete' package for your camera to your hard disc, then click
CHDK -> Card (enable 'Overwrite' first), select the downloaded zip file...
If you want to load CHDK automatically, you can also make the card bootable with the
Make Bootable button. Then LOCK the card. To disable CHDK unlock the card...