I will be flying DFW-SFO on a Virgin America ticket, then SFO-HKG-BKK on a separate Cathay Pacific ticket (overnight layover in SFO)

1.Since there are 2 PNRs involved, will Virgin allow me to check my bags all
the way to Bangkok?

2.Will the fact that I am connecting to an international carrier affect the
baggage fees in this situation? The reason I ask is that a friend of mine
recently flew DFW-Europe on 2 separate PNRs (American and Air Berlin) and
when she checked in with American, she was told that since Air Berlin was
the "major carrier for the trip" that their baggage rules prevailed for the
entire trip and the baggage fee for the AA DFW-MIA flight (normally $25)
was waived.