The links in this list may help. 24 hours to learn a complex program and implement changes is optimistic.
The YouTube links may be your best bet.
In my opinion you should find a way to extricate yourself from this situation and/or the unrealistic deadline. David Anders has said that learning this sort of software in "less than 24 hours" is optimistic . I would venture, without meaning to be negative, that it's impossible.
Please note that there are lot's of people here that can help you out, but a forum like this is best suited for answering specific questions. Books, tutorials and other training resources can provide a "basic understanding" that can better help us to help you.