One of the first things that I would do would be to produce a realistic project plan based on the work still to be done, and be open and honest with your stakeholders. If the deadline is 2 weeks away and there's 3 months of work left you need to highlight this. I wouldn't bust a gut (and kill the project team) trying to meet the original timescales.

I agree with Craig - "you are regarded as a cut above the rest and that management have faith that you are the person with the talent and skills to deal with it"