I guess best solution to clone the player would be just stupid FTP and mget all necessary stuff from old player, but what exactly?

I don't think the FTP server supports transfer to another FTP site controlled by a FTP client on your PC - you'd have to get a FTP client onto one of empegs, or download to PC first and then upload to the new empeg.

I'd just build the new drive (using the builder image) and then mount it as (new) primary
with the old as temporary slave and copy the stuff over to the new drive. Then build and mount the second new drive as new slave. To change the drives you'll have to open the player anyway...

/Michael