emonTx + 2x Elster meters

Both my systems (east and west) are now commissioned.

I have an Elster meter on each and note with interest that at least one can be interrogated via emonTx.  Obvious question:  What would I need to do to interrogate both?

Further questions:  Can I use the outputs from each instead of current transformers?

Would there be much involved?  I could most likely design the hardware necessary in order to OR an interrupt etc. but I'm no software dude.