Hi! I own a file-centric website where I publish translations for game modifications. What I'd like to do is to add a short description to category page so instead of taking a text from the main block it would display a short description.

There's custom fields in Invision and text field would fit just well. Is there any chance I could display it outside of file pages?

Are you referring to showing this within the listings? If so, this is something you would need customisation for really.