Financial Model for Startup and Investor Presentation

I have a detailed financial model (balance sheet, income statement and cash flow statement) of a start up business. The model was developed by a third party and I need it modified on excel to reflect certain investment scenarios. I also have a draft investor presentation on Powerpoint that I need assistance in further developing. The project is very straightforward and simple, but needs someone with MBA type skills with understanding of finance and accounting and experience with Microsoft Excel and Powerpoint.