Will WordPress' RSS feed also carry the custom posts created by CustomPress?

I am possibly using CustomPress for a company directory as part of my client’s WordPress site. I worry however about any of the Published custom posts for companies going out via the site’s RSS… Will they go out on the main RSS feed or will they not?

For example, the main site has daily news abut the company’s staff, services etc. and that is on the RSS feed and syndicated to partner sites. But the Company Directory will also publish data, so I would like it to never go out on that main RSS feed. Is this possible?