Magento Rental module for rentable products

For the extionsion Booking & Reservation (AheadWorks) for Magento i'm looking for someone who can program and change the module. It is for a rental company in renting paintballequipment and other outdoormaterials. The products on these websites should get individual discounts when renting longer than x days/weeks etc Also I need to define individual rental-rates? e.g. weekend-rate. A short wishlist: - ability to rent one or more of several items - front-end calendar showing the availability - drop-downs showing start and end dates - time dependent price: example 1 day = ?10 , 1 weekend = ?15,- , 1 week = ?20,- - price shown on the product page updates when start/end dates change (Ajax, jQuery, etc) - show total and available number of items - admin can set "dead-time" after item returned (for cleaning, etc) - admin can set min and max booking time as well as granularity, like min 1 day, max 14 days, possible values 1, 2 4,8,12 days - discounts by coupons - discounts by quantity - discounts by gift certificates - custom disclaimer for each service/product - option for customer to sent the product (with UPS etc) - if customer choose sending option the product cannot be avaible for two days before and two days after. - easy to translate in dutch and french