This pack allows sprites to be loaded externally at runtime from a user's computer or from a single server. Crossdomain security is not set up yet so it can't load images from other servers and is unlikely to work with most game portals. Presently only one sprite is loaded per actor, but future versions will hopefully allow animations to be loaded.
Instructions:
Attach Load Sprite to an Actor.
Do NOT attach External Image.
Specify the URL in the actor's attributes of the behavior.
When the character loads, the sprite will be generated from an external file.
This uses code from this blogpost:
http://www.iokat.com/posts/3/loading-external-images-for-use-with-flixel-sprites