As far as I know you don't need to convert the frame rate, you can encode and author a DVD as 24p, the player will insert pulldown if needed to give a NTSC compliant output.
Assuming your project is 24p then I think you can also just render out to vanilla NTSC and select whether you want 24p or 24pA pulldown, there's a white paper in the knowledgebase about all things 24p.
BTW 23.976 is SO close to 24p it doesn't matter from what I know unless you were going to try a match back somewhere down the track.
Bob.