Flash mx, flying butterfly...please lead me

hi, i have a nice butterfly (vector artwork)…i want to use it in a flash site…i want it to fly around - like they do…

any suggestions? can someone help me out with this?
can you point me in the right direction?

ive never done anything like this before, im not a novice in flash - but i want to make it look right.

i cant imagine it being that hard…

look at this for an example… http://kapaluamaui.com/index_flash.html