Have a 130 year home that has a 2 piece shower stall with a pvc drain that leaks... the shower is over the front hall with a very intricate paster ceiling that is not going to be cut out... how can I seal the pvc to the fiberglass?

I don't know exactly what you can and can't do because I can't see the situastion. But to seal PVC to fiberglass you can use GE silicon. If you need more info let us know.