I think that currently emplode supports only single empeg connection at a time. In other words, you will have to re-apply uploads/changes to other player.

That said, Jemplode guys already have alpha version of their tool that will talk to any number of empegs and enable copying among them. So, you tidy up one empeg (either using emplode or Jemplode), then copy changes to other(s). I don't know details yet as my second empeg still bides its time in Cambridge.