Add an option to an existing function on WordPress site

I need to add an option to an existing function on a WordPress site. When a new online game is added now using the existing form the game plays in a new web browser window. I want to add an option to have the game play in an iFrame on a page in our site. The way I see it being done is adding a iFrame Yes/No drop down option in existing form. If Yes is selected fields appear on form to enter Width and Height size of iFrame. If No is selected the function works as it currently does now creating a new browser window for the game. The functionality and PHP code for playing games in an iFrame already exists in the site for games added automatically from an XML feed. We just need this as an option for games manually added using the form. This job will only take a PHP expert who knows WordPress a couple of hours at the very most, plus a little time to get familiar with existing functions. You can see more detail in the attached document. I will give links to the site in chat. What we are really looking for is someone who we can work with again. We will have more small jobs like this coming up and larger jobs as well for new sites we are developing. I look forward to talking to you. Please put READ AND UNDERSTAND in your reply. Bids that do not will be ignored.