Adding a Form step to checkout process per item

Im looking to add a form that customers fill out in the checkout process. I sell graphics so I want a form where the customer has options on checkout to fill out a webform that has text boxes so they can describe what they want. I am using virtuemart component on my Joomla website. I know this may be hard to understand. For a demo of our site and more information on this job please contact me on skype - [Removed by Admin] . I don't plan on spending more than $40 on this becuase this is at most a 1 day job, and any experienced coder with joomla can do this in less than an hour. Thanks!