Who is the real prophet, Neale Walsch or Muhammad?

I have written about Muhammad several times in blogs and every time Muslim friends asked me to study Quran well. So I spent my time to study it little more and understood that Allah has given us easy and enjoyable ways of living. For an example, Allah says plundering is lawful but only if that plundering is done for the sake of Allah.

Tabari VII p. 80
When the events of Badr were over, Allah revealed al-Anfal (Surah 8) in its entirety concerning it. On the day of Badr, the two armies met, and Allah defeated the polytheists. Seventy of them were killed, and seventy were taken captive.

On that day Allah revealed to Muhammad:

Quran 8:67: It is not for a Prophet that he should have prisoners of war until he had made a great slaughter in the land. You desire the good of this world (i.e. the money of ransom for freeing the captives), but Allâh desires (for you) the Hereafter. And Allâh is All-Mighty, All-Wise.

Quran 8:69: So enjoy what you have gotten of booty in war, lawful and good, and be afraid of Allâh. Certainly, Allâh is Oft-Forgiving, Most Merciful.

After that, Allah made booty lawful to them.

Nowadays I am fed up with my teaching profession and seeking for an easy way for living. So I am ready to embrace Islam and join with a underworld gang. But my problem is I have found another prophet called Neale Donald Walsch. His god also provides good ideas for easy ways of living.

Walsch : at a low period in my life, I wrote an angry letter to God asking questions about why my life wasn't working. After writing down all of my questions, I heard a voice over my right shoulder say: "Do you really want an answer to all these questions or are you just venting?" Though when I turned around I saw no one there, I felt answers to my questions filling my mind and decided to write them down. The ensuing dialogue became the Conversations with God(CwG) books.

Walsch: CwG says that Hitler went to heaven. This does not mean that the soul of Hitler did not experience the consequence of Hitler's actions. It does mean that those consequences, once experienced, produce growth, not eternal punishment--and growth is the highest outcome of Life itself. It is, in short, heaven.
There is no punishment in God's kingdom, but there are consequences. That is, things that happen as a result of other things. But this system is not a process of "pay back" of "karmic debt." It is simply the way the process of Life Itself works. Outcomes are the result of out puts .
This god says that every thing is inevitable. We haven't free will. therefore I can do anything without any regret.

So I like both prophets and their gods. But which prophet is the real prophet? If Muhammad is the real prophet Walsch should be a liar because according to Muhammad he is the last prophet. If Walsch is the real prophet Muhammad becomes a liar because of the same reason.

So dear friends, please help me to find out real prophet.