I had the same trouble with the music length and got over it by :
adding the slide show and transition time together and multiplying
it by the quantity. I then used a program Mp3 direct cut downloaded
from
www.webattack.com ( freeware )to select the length of music I
wanted. It is longwinded I know but works and you can sellect any
part of the track to use. I also had to download another
program dbpowererampmusic converter to change the music from wav to
mp3 !!!! Also downloaded from
www.webattack.com ( freeware ) .
I am having trouble getting some video into the slide show at the
moment ( 5.1b4 ) and again am looking for another program to change
AVI to mpeg ! I have tried 4 that I downloaded and only WINmpeg
video converter worked.