Availability / Booking Calendar

I am looking for a script that will show a calendar on a webpage. I needs to have the following features: 1. Display 2 months at a time current and next month. never more than this 2. Allow the user to book a time slot (only in 1 week intervals) 3. reserve the week (for 10 mins) until payment is processed (paypal) 4. request the users, Name, email, and website information 5. after payment is processed modify the calendar. 6. Needs a way to have the Admin able to manually book a week with no paypal transactions. The available weeks should display in green, grey for booking in progress, and red for booked calendar should be about 300 x 300 width is most important. Tracking is not that important.