If you really want to make space for a few more passengers (or crew members, if you're trying to capture other ships), you can expand the living space of your ship into the area usually reserved for outfits.
| Category: | Systems | 
|---|---|
| Price: | 40,000 | 
| Mass: | 5 tons | 
| Unplunderable: | Yes | 
| Bunks: | 4 | 
| Outfit Space: | 20 |