displaying multiple rows in category.php

I have my site set up using a category menu bar. When you choose a menu (category) item, by default WordPress displays the categories via archives.php. Because I wanted to eliminate the sidebar when viewing categories, I created categories.php and removed the code for the sidebar so its a single column.
The theme I designed for the site displays four images in equally divided areas across the single column post/page in every instance but the category view, and I’m wondering how to direct the category.php to read the template so it too displays the images four across, rather than vertically? Essentially I want the default category page to read my page-template-mag7a.php file…

Here’s the category.php file:

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Thanks ??