Help: flash actionscript drawing application

Question

Looking for developer help who can develop a project a little further based on Carlos Yanez basic drawing application.  He provides all the source code for the basic application.  I need the exact simple application but the ability to choose a background image from a file on the server as the canvas and I want to save the created image on a server file instead of on the client machine. The ability to change the pencil drawing size would be an additional plus.  I work with php and mysql so I would like to use them to store the file parameters, even as a blob in mysql, along with some additional user (server) defined variables (I can do the php/mysql side if I can get the file there, I understand there is an swf to png ByteArray class that might be able to save on server .   The project is for an opensource group so the final product would need to remain as such, I would be able to pay for the modifications mentioned above.  The source files are available at the links below.  Thank you.
http://flashtuts.s3.amazonaws.com/080_DrawingApp/Src/preview.html
http://active.tutsplus.com/tutorials/games/create-a-basic-drawing-application-in-flash/

Answer 1

2.5 years later, would it be possible to use this application within another and turn on and off the drawing functions when not specifically at this 'function' of the application?
Possibly by killing the canvas.addEventListener(s) and then setting tham alive again on return to this function.
Could it easily be made a back end section, on initial fire up if it did not have the stage items, it gave an error.
Very green to flash. Thanks for ant comments.
(If Mr Graffiti had added much more, on his quick  job, he would have been in competition with Adobe PaintBrush)
Thank you