OScommerce, template customization

This project is for the installation and customization of an OScommerce / ecommerce web store. We have purchased a premium theme "Sweets" and would like that installed and working. [login to view URL] We also have a need for an "imprint' product attribute. For example, the customer can buy a Shirt, and using the attributes they can select the color or size of the shirt. In additon to those attibutes, we need the customer to have the option to include a "Text field" for the customer to use for Embroidery/monogram options. So the customer should be able to Pick the "Size", "Color" and put the "text" that they want embroidered/monogram on their product. Here is an example of a product cart that has the function we will need. [login to view URL] For our Embroidery / Monogram option we only need it to be Yes/No. If the user selects Yes, then a second box will be needed for them to type in the "text" they want. The "text" then needs to stay with the product order, in shopping cart and for the reciept. My understanding is that this is a well known and documented "Product Attirbute customization" for OScommerce. Which should not need to be developed from scratch. To summerize: We need OScommerce and theme installed on webhost (godaddy) We need Product Attribute for custom text on products