The serial number for emplode is only needed for installation, and then only for the v1.03 version. Since it's not used for anything, we stopped the v2.0 installer asking for it.
You can therefore use emplode to connect to any empeg on your network (or connected to USB). Or in fact, anything else empeg-compatible, e.g. an HSX-109.
You can't open two players at once in emplode. This was initially due to the legal issues, but since we're now allowing downloads, I suspect that this becomes a moot point.
Also, as soon as you _can_ open two players in emplode, everyone will want drag and drop between them. We don't have anything in emplode to allow this right now.
As far as keeping the two players completely in sync, you cannot currently use emplode to do this -- you'd have to make the changes to both players individually.
Alternatively, you could use the clone tool (but it does a complete clone from one player to another, so it's only really sensible the first time).
You can probably use JEmplode's clone tool -- I don't know what functionality it offers. Give it a whirl.
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roger