how do you model a timing belt ?

Hi all

Just wondering i'm using solidworks 2010 , need to make a timing belt.  Ive had a go but with no luck at all

i was wondering whats the easiest way to model a belt? and can they be made so they can be manipulated and used for different assemblies?

many thanks look forward to your reply

alex marler uni student

SolidworksParts And Features