Needs a rental software that plugs in to our oscommerce site  to make a complete rental solution.
Feature list must  includes

ADMIN:
Management of customers and their rental plans
Creation and deletion of rental inventory
Ability to print lables for each  rentals with the title and bar code
Ability to create new rental plans and modify current ones
Easy product management - update products description, pricing, tax class, image, etc.
Handles taxes for products and rental plans
Put products on special and make more sales
Ability to adjust the rental ratio used to show the product availability status (Available Now, Short Wait, Long Wait, etc.)
Bar code system that automatically generates bar codes for each rental based on the tracking number you put in
Box/Season multi-disc sets - the ability to associate multi-discs with one main box set title, and add all the discs to the rental queue at once
Auto-generation of box/season set discs so you don't have to enter disc 1, disc 2, disc 3 products one at a time
Product image auto-sizing - you only have to upload a big image for your products, the smaller images are automatically created
CUSTOMER:
Custom signup process where customer can pick what rental plan they want
Rental queue management 
Ability to upgrade or cancel membership
Member billing page showing the plan they are subscribed to and their next billing date
Ability to do a product search by category, keyword, price, and description
100% Web-based Front and Back-Ends
Admin Console able to  support up to 10,000 Customers and 25,000 DVDs
Integrated Affiliate Program, Coupon Code Module, and Banner manager
Purchase, Clearance Sale, and Buy-a-copy of the renting dvd Functionality
Supports Automatic Re-occurring Billing and Free Trial Periods
Easy to Use Content Manager for Updating the Site Anytime (adding Categories,
DVD Rental Software should automatically notifies the Customer when:
They Sign-up for the Monthly Rental Plan
When a DVD is Sent out
When a DVD is Returned
When Purchase a DVD
When their DVD queue reaches a minimum quantity
When they are billed
Succesfully edit their info
When they forget their password and request a new one
Rental Software automatically notifies the Store Owner when
A Rental Customer Signs-up
Someone Purchases a DVD
Customer Modifies His/Her Information
Rental Customer Cancels His/Her Membership
Rental Customer Upgrades/Downgrades His/Her Rental Plan
DVD is returned
DVD is ready to send out
The Current Customer Billing cycle comes up
Revenue per Customer/Month/ DVD