i noticed that on the play back where the tempo change thing is that it skips like in intervals of speed and i dont know how to get it on the exact speed wehn i want it to. Like say it goes from 135 to 139 but i want 137.
Can anybody help me with this
thanks

The tempo slider should not be used for tempo control.  To get correct tempo playback every time you should go to Create>Text>Tempo or Metronome Mark.  You can also select the measure you want the tempo change and hit Ctrl+Alt+T.

Gabe

hmm, well i did that and all it did was put in the tempo marking but didnt play it back at that tempo.
and heres another question, I was browsing the forum and i found a guy who put VDL with music from the movie Signs. I was wondering if you can put a mp3 like onto your score in sibelius so i cant do what he did on other songs.

Tempos in sibelius work like regular sheet music.  Use Gabe's post to make ";quarter note = 137"; (using the quater note symbol of course)  When you do ctrl+alt+t, right click at the blinking cursor and you'll see all of the available tempo options.

Since you are asking Sibelius related questions and not VDL2, you will find a lot more information at their website and forums, and of course in your user manual.