Oscommerce single page checkout mod

I need a customization for my oscommerce installation. I need a single page checkout with some mods. One page checkout is an existing contribution. You can start working on this contribution (one page checkout): [login to view URL] But I need to add and remove some fields of this checkout page. ie. Remove bill address, delivery address, boxes, and let the customer insert on real time on checkout page: Name, address, city, etc of the recipient. Date and Time for the delivery. Also payment and shipping method (this comes with the contribution listed above) and message for the recipient. This is a gift delivery service so thats why I need all this. The template is already runing, your script might be placed into my template. Of course, all the information filled, needs to be shown in the confirmation page, and needs to be inserted into the database, and sent by email to customer once checkout is over. I need this to be done asap, send me your offer and I will give you more details so you can give me an estimated time for this job. Thanks for looking ## Deliverables Site is in spanish, but I understand english, so you can comment the soft and let me know what words to change, or I can give you the text in spanish.