Frame rate Vs. speed issue

ok guys heres one im sure you havent gotten before!
ignore what the link sais just download the movie if you want to see what im working on (its divx 5.05).
anywho, heres what i need to do:
i need to double my frame rate (from 30 to 60) but keep my animation playing at the same speed. Effectively, is there an actionscript that can make my animaiton wait one frame before going to the next because otherwise i’de have to manually drag each tween out to double their length.
the problem im addressing (if youve watched the video) is i need more frames in the animation to make it look smoother but i cant speed it up otherwise it would go out of sync with the 3-D camera i animated.
please help this is for an important school assignment!!