First I don't have boot.ini, mine is DISKBOOT.bin, the other one is PS.FIR,
I'm not sure, perhaps cause I always install manually without cardtricks, but as a general rule you need to extract the above mentioned files FIRST and then copy it into the root-folder of your card.
You should then make the card bootable, either with cardtricks or while having loaded through unlockedcard-firmupdate menu entry.
If you think you did all that, it's probably really the wrong CHDK for your camera, did you check your EXACT firmware version?
Check the wiki for that.-->(CHDK - CHDK Wiki
hope that helps you,