How can i create a new order for a customer manually in the admin section? I need to add the downloadable to their account.
There is a very useful attribute called act on behalf of customer that will help you
Here is the doc link. Scroll down a ways, it's towards the bottom.
http://www.abantecart.com/ecommerce-documentation/36-admin-user-manual/sales-menu/customers (http://www.abantecart.com/ecommerce-documentation/36-admin-user-manual/sales-menu/customers)
Also you can edit an order from within the aPanel. Here's the doc link for that information.
http://www.abantecart.com/ecommerce-documentation/35-admin-user-manual/sales-menu/orders (http://www.abantecart.com/ecommerce-documentation/35-admin-user-manual/sales-menu/orders)
One of these will allow you to accomplish your task.
Lee