I've played as a bard quite a bit in NWN, and now I'm trying one in NWN2. Curse Song helps a lot to soften up enemies in NWN, so I've taken the feat in NWN2. In NWN as I remember, it shows up in the radial menu as a class-specific ability. In NWN2 It doesn't show up in the Bard "tab" next to Modes on the bottom right of the screen.

All I see is Inspire Competence and Inspire Courage. Is it automatically activated?

The character is a Bard (3), Fighter (1) human, with Int 10, Cha 14 and Perform maxed.


EDIT: I went to the Character Description sheet, clicked on the icon for the feat, and dragged it to the Bar on the bottom of the screen. Simple!