You would have to open the FLA and AS files and change the code in the AS file. The controls are drawn dynamically.

How can i add a button on the progress bar that shows the user more clearly that you can drag the time line? The download version works but there is no 'button' on the progress bar that some of the versions in the gallery show... I'd really like some pointers on what to do there!

Just realised that the other versions are older - and dont use AS3 as much, so are quite different. Still I'd like some pointers to add in the seek bar somehow.