Is there a guide on how to wire Bachmann EZ track for multiple train operation?  I am a novice at electronics but love to design and run ho scale trains layouts.  I have one now that uses multiple power packs for running trains on separate lines, but I would love to cross these trains over onto other lines if I knew how to do the wiring or knew what equipment I need to do this.   My quandary is that terminal tracks are already hard-wired, so I don't know how controllers would be used.   This is DC layout, NOT DCC.