Animation question?

just wondered if anyone has any ideas how to acheive the following

i know how and what i want to animate the problem for me comes when my main movie is 30 frames a sec and my animation swf is 15 frames a sec when i load the 15 frames a sec ani in my main movie the main movies 30 frames a sec takes over which i know about, the problem i have is that my animation at 30 frames a sec just looks wrong does anyone have any ideas on how to make my 15 frames a sec animation look slower when called in the 30 frames a sec main movie, i would just change the frames a sec on my main movie but then my menu looks sluggish which i perform tweens on.

thanks in advance