Need Programmer To Add New Features To ShoppingCart Script

We are looking for a very skilled programmer that is familiar with Zend Frameworks and PHP to perform some work for our company. If job is performed well, then this is a long term paying job we are looking for someone to fill in. We offer a third party shoppingcart solution to already made websites. Members sign up for our website to use our shoppingcart service to add to their already made website. [login to view URL] you can visit to refer to what we have. We have something very similiar to foxycart. Here is what we are needing done. Digital Download manager. Right now the shoppingcart does not support the ability where users can upload their digital download product and have it sent to customers after successful payment. We would like to get this added in. Here is a script we found already that does all this that can easily be scrapped and added into ours. [login to view URL] We can purchase this for you to work with and use. Fix Bugs. There are some small bugs in the script that need to be fixed. Most likely a path change issue as we just transferred the script to a new website. Bugs are bad links going to a bad page error. Template design change. We are wanting to change the design to the backend to a new look and feel. We have the template and its files already to what we are wanting to change it to. Just need someone skilled to go in and perform the change. There are many other new features and enhancements that we are wanting to get done, but want to keep it simple right now and get these done first. Script is done in PHP Zend Frameworks and MySql database. We are looking for someone that has plenty of experience to work on this project, so please bid only if you have 10+ experience and are for sure that you can perform the job. I do not want to waste my time and I bet you do not want to waste any of yours.