[Plugin: WP-Table Reloaded] custom classes for rows?

Hello again!
Another quick question…Is it possible to add custom classes to certain rows? For example, I want to break up different sections of my tables using a top border on the rows where a new section starts. I can do this by listing every row for every table where I need the border in the custom css. But there will be 9 or so sections per table, with lots of tables on the site, so the code is going to get bloated very quickly. If there’s a way to add an extra class to the rows (such as .topborder or something) where I want the border, it would be amazing. Is this possible? If not, no worries, I’ll just do it the longer way ??