Uhm... Yeah. This won't be fun. Hopefully, you're using the legal version, or the input command may be different. The 'best' way to do this is to look through every script and if you find:
if Input.trigger?(Input::C)
replace it with:
if Input.trigger?(Input::A)
How I would do that is, on every script, press Ctrl+H to pull up the 'Replace' command box. Where it asks for 'Find what:', put in the first code, and where it asks 'Replace with:', put in the second code. Then press 'Replace All'. This will find and replace every instance of the C input command with A.
This will really quicken and automate the process. Do remember to backup your script thing first, cuz this 'should' work... I just havn't tested it. :wink:
Good luck!