It is true that salaat the system and it's component salaat the "namaaz" is stressed in the Qur'an. However, the "How" is not expalined. We do find hints such as call to prayer, rukooh, sujood, wash before prayers, and shortening of prayer. Now, as we all know, majority of us pray not by reading Hadees books but how our parents/friends/relatives taught us. For those who wish to continue this ritual, perhaps it would make sense to them to know whatever they are doing, as long as it matches the Qur'an (Call, wash, Qiyaam, rukooh, sujood etc.) then they may keep doing it.
As Allah does not forget, I sometmes wonder if it was a practice applicable to a people of a certain generation? When the Messenger was with them, he must have showed them how or modified what was in existence?? Or:
Allah does not forget, and perhaps He wanted us to perform it as it is handed down to us over generations. He did not give us details so it gives us some room to modify it according to our circumstances. The Exalted Messenger did not invent Salaat. It was a practice that was followed by previous generations. It would be interesting to research how the Jews pray. The Christians pray whenever they need to. Usually they go into a quiet room. Read the Bible. Some of them go down on their knees and pray. Some pray early morning and at bedtime. Others pray whenever they feel a pull. We do not find any evidence of a ritual prayer in the New Testament. We do read Jesus praying when ever he needed to connect to God. We also read that at a certain Garden, he "fell on his face" (prostated) and prayed. I wonder if we find any evidence of regular prayers, rukooh and sujood in the Old Testament.
Which ever the method, it seems the idea is to regularly read The Message and reflect on it. We read that the morning reading of the Qur'an is "witnessed". Any Namaaz that we perform and not know what we are saying, or reading does not make sense and has no effect on us.