Going from 23.98/24 to 29.97/30 is inverse pulldown, and common. In fact, if you are talking about putting together a DVD, you can create a NTSC DVD with a framerate of 23.98, and the DVD player will perform the inverse pulldown for you and play it as 29.97 video.
What NLE and other tools do you have at your disposal? You should be able to render out a 29.97 version with no problem.