i wanted 2 ask about sync. subtittle 2 mpeg movie

[alakoma]

i got a subtittle for a movie that i convert from divx 2 mpeg
using thampg.
i ajust the mpeg so it will fit to 2 cd's.
now i understand, that i need 2 split the sub, and then using
winsubmux to add the sub 2 the mpeg.
but i notice that the sub dont sync, with the mpeg.
how can i sync the sub to the mpeg ?
(do i need 2 get the frame rate that i made the movie ?
or i can ajust the sub by knowing how much time the movie
is on each cd ?)

[alakoma]

well ???
does anyone can help with this problem ?
please ????