Button downloader in flash

Ok i wanted to make a button that will fetch me a file from a local folder.
The application will run from a dvd. i tried simpel to use geturl() however as the files are pics the browser opens them which is something i dont want due to large size approx. 150mb each and i would like to give the opportunity to the user to save them wharever he wants.

I have seen some downloaders arround which i could not get to work.
One i really liked was http://www.tink.ws/blog/filereference-source/ while the example itself
http://www.tink.ws/blog/files/flash8/DownloadExample.html

i tried to change the URL of the file name and the name that is going to be save in the script file but nothing happened when the file was locally. I tried to do the same from an online pdf but it was not available to fetch it due to security reasons…

Any help i am kinda new to all this :S

Ps. if it is possible to bypass that default opening of the browser with th geturl() i guess its easier than writing a whole actionscript code or even tweaking it for me heh