One of the biggest questions is why did Obi-wan walk away from Anakin. In my version, Obi-wan doesn't give the lecture about Anakin being the chosen one, he simply looks at Anakin, not believing what just happened, and says you were my brother, I loved you. Then Anakin replays I HATE you, almost telling Obi-wan to leave. Basically saying: I love you, oh yeah, well I hate you, get out of here!) So it's not so much Obi-wan walking away, it's Anakin refusing his friends compassion. He then procedes to pick up the saber, almost for him to remember his friend, one more glance back, and then he walks away.
I'll try to see if I can get it uploaded tonight somewhere, is rapidshare the easiest?