There are some suggestions below for possible pieces of music and readings.  They are only suggestions - please do feel free to choose other pieces of music.

Music  1 - At the Entrance of the Bride

Bridal Chorus, Wagner
Trumpet Tune, Purcell
Trumpet Voluntary, Stanley
Trumpet Voluntary, Clarke
Arrival of Queen of Sheba, Handel
Hornpipe (from the Water Music), Handel
Procession (from the Water Music), Handel

Music 2 - During the Signing of the Registers

Air (from the Water Music), Handel
Minuet (from Berenice), Handel
Canon, Pachelbel
Jesu joy of Man's Desiring, Bach

Music 3 - For the Wedding Procession
Wedding March, Mendelssohn
Toccata , Widor
Grand Choir, Guilmant
Nun Danket, Karg-Elest
Fanfare, Lemens
Sortie, Lefebre-Wely

Readings
Genesis 2:18 - 25
Psalm 45
Proverbs 31:10 - 31
John 2:1 - 11
1 Corinthians 13:4-13
Colossians 3:12 - 17
1 John 4:7 - 12
Ephesians 5:22 - 32

Hymns
O Worship the Lord in the beauty of holiness
Come Down, a love divine
Tell out my soul the greatness of the Lord
Be thou my vision
Dear Lord and Father of mankind
Guide me a thou great Redeemer
King of Glory, king of peace
Love divine all loves excelling
O praise ye the Lord
O worship the King
Praise my soul the King of Heaven