Hi Wilco!

We have not tested Simple:Press with Bricks or AutomaticCSS but cant see why this would not work. I would recommend that you install the free version of Simple:Press and try it out in your environment. Preferably on a staging or test site. Then you could verify that it works with your specific setup. If you have any questions regarding the setup you are welcome to get back to us with questions.

Simple:Press is a WP plugin meaning that you use your normal WP database for all the Simple:Press tables so there is no need for an extra WP install. Or have I misunderstood your question?

I am not sure what you mean by "post to topic" functionality? Are you referring to any of the Pro Addons?

Best regards,
Joakim @ Simple:Press
Timezone: CET