I have the same problem.. did anyone find a solution ?
Here are more explanations.
1) Demo files here: http://blogs.adobe.com/edge/2012/05/15/bootstrapping-edge-compositions/
Edge API en français: http://www.adobe.com/devnet-docs/fr_FR/edgeanimate/api/current/index.html#AdvancedTopics
In link you have posted contain two preload files "composition_one_edgePreload.js" and "composition_two_edgePreload.js" to load.
If I need 10 or more same edge animates, I should copy the projectname_edgePreload.js file and paste it 10 times with 10 different names and then I should load each of them sepeartely.
Does the same edge preload file(projectname_edgePreload.js) be used for all these 10 animates?
If there any other way to do like that?