I am looking for someone to install a software like linklok paypal (http://www.vibralogix.com/linklokipn/) on my web site. I am on a Linux shared server. Hatchling account: http://www.hostgator.com/shared.shtml

I can buy the above mentioned software, and have it installed by you, or you my suggest another software or script.

The system is going to be used for selling images for download with the PayPal ipn function.

The files must be stored in a directory outside the root to avoid them from being accessed by spiders and indexed. I want a high level of security, and easy function system that can be easily integrated with a HTML based web page.

Minimum Required functions:
1. Must work with with Paypal's Buy Now, Add to Cart and Donation buttons.

2. Verify that orders are genuine with Paypal before delivery (IPN)

3. E-mail download links to buyer (preferably encrypted url to files)

4. Check that the amount paid is the one defined for the product.

5. Displays download page after payment

6. Download links must be possible to set to expire after a fixed time and/or specified number of downloads.

Please let me know what you can offer, and specify what service you are offering. I will not consider any offers which is not specified.