According to the Apostolic Ministries of America (I do attend a Oneness church), in the "Holy Scriptures, God, Jehovah, Lord, Father, Word, and Holy Spirit denotes one and the same being, and are all names and titles of the Deity." (retrieved from their website)
This is exactly as I see it. In the beginning, there was God, and God came to Earth manifested in human flesh, called himself Jesus Christ, God's son. Jesus was crucified, buried, and the resurrected on the third day. Christ ascended back into Heaven and left his comforter (the Holy Ghost/Spirit) behind on Earth to be with his followers. Exodus 33:20 says "Thou canst not see my face: for there shall no man see me, and live." The only way we can see God is by seeing Jesus, who is God manifested in human flesh. The Holy Spirit is exactly what it is... Jesus' spirit he sent to Earth as a comforter.
Acts 4:12 (KJV) states "Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved." Likewise, Acts 2:38 says "Repent, and be baptized everyone of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost." Yes, Matthew 28:19 says "Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost." But these are just titles, not The Name which IS Jesus Christ just as Peter commanded in Acts 2:38.