Again, nevermind I found it. Ok so you need to go into the categories.php file:
Find this:
show_form_header("categories.php", "savecat", "cat_form");
show_table_header($lang['nav_categories_add'], 2);
show_input_row($lang['field_category_name'], "cat_name", "", $textinput_size);
Add Below this:
/*cat image row*/
show_input_row($lang['field_cat_image'], "cat_image", "", $textinput_size);
Now go into your template package and open admin.php...
Find:
$lang['field_image_name'] = "Image name";
$lang['field_category_name'] = "Category name";
Add Below:
$lang['field_cat_image'] = "Image ID Number";
Where the "Image ID Number" is the row description for that field.
Save and upload, no more error.