Saving a file when going directly from Lr to Ps and back to Lr

Just finished watching Terry White's webinar and I have two questions I hope someone can answer for me.

1 - He mentioned something that sounded like it was the CORE channel which seemed to be a place for contributors to get information. Can someone tell me how to locate that forum?

2 - I have not been clear about saving files once I go driectly from Lr to Ps. When going from Lr to Ps, does Ps always/automatically save back to a new file without overwriting the original? I have been using Save as and appending a suffix, but would rather have this taken care of automatically if Ps does that.

Thanks for your consideration - J. Ross