Thank you for your comments so far.
So, aside from the baptisms in the divine liturgy on Great Saturday, would the epistle and gospel readings of the baptism replace the prescribed readings of the day? Also, would the apolyticion of Epiphany be chanted at the end of Matins and at the time of the small entrance of the Divine Liturgy?
First part of question - the readings for Baptism are separate from any readings on the Lectionary that day for the Divine Liturgy.
Second part of question - No.
Also, I read earlier someone saying that only the neophyte (newly baptised) would commune at the time of Holy Communion. Liturgy is "public" for all and not exclusive so I'm interest to hear what poeple to have to say about this matter.
In USA, infants are baptized, christened and given Holy Communion.
In Greece, infants are only baptized or chrismated. Priests there have discretion as to giving Holy Communion to infants.
A newly baptized adult usually receives Holy Communion with everyone else although a newly baptized adult can choose not to commune. Some Jurisdictions have traditions about a neophyte receiving Communion 3 weeks in a row.
I can't speak for other places/Jurisdictions.