hosting order integration with Paypal

Hello, Only for Paypal experts. If you don't know how to get real time exchange currency rate from Paypal. Need to redone an order form from scratch. Its a hosting order proccess, integrating Paypal subscriptions. Have to be done in PHP, using Mysql. Multilingual, strings would be stored in files, one per each language. Multicurrency euro and dollar with real exchange rate if possible. Template based. Hosting packages are grouped on host packages, dedicated and virtual. All details about plans, prices, etc would be stored in a single file in an array or in a database. Actually exist one archive for each site, the process manage orders from 3 diferent sites. Order proccess is divided into 4 steps: - 1st step: select domain, product and fill customer details - 2nd step: select payment period and payment method - 3rd step: complet payment details at Paypal or customer bank details - 4th step: show result and send email. User could go back and fordward at any time on the order process, to change previous data. All steps must be stored on database and after finishing order details must be emailed to customer on the right language and to admin. I want something really simple but flexible that allow us to define complex rules on hosting packages, eg: domain free if you pay quarterly or annually. If you are offering an already working solution, backend must be very, very simple. I will point you to the actual forms and you must define the whole system from scratch. You accept obey deadline as follows: 1 day to define flow and mysql structure 3 days to show a prototype 2 days to fix bugs and deliver system Project must be finished in 6 days or less. Maximum bid accepted $150, payment will be done when the script is finished and working. thanks, pepe