Okay, this might sound downright stupid but how do I change the game's resolution? When I go to Options > Detail, I don't see any option regarding resolution. Can anyone help me out?

This is in FreeSpace 2.

You can find it in launcher (FreeSpace2.exe) -> Setup -> Video -> Currently Selected Video Mode. If you won't find any interesting resolution you can hit Detect Available Cards and/or switch to FreeSpace Open (sticky ~SCP installation guide).

Thanks! Will check this out when I get to work.

EDIT:
Just checked it out, it seems to be what I was looking for, however, it only has 1024x768 and 640x480. Based on what I read at other threads, I can see how I need to have FreeSpaceOpen to extend FreeSpace 2's default capabilities. Thanks again!