It is certainly possible Lucysmom, but the circumstantial evidence of that time says his name was changed specifically so he could attend elementary school in Indonesia. As we all know, there was no reason at that time to try and pull the wool over anyones eyes, so my bet is that it was changed. He went by Barry Soetoro at the Pinhaiou school in Hawaii as well. School pictures, etc.
I do not see any young pictures of him after the age of 5-6 as Barak Obama...but, it is possible.
I've seen pictures of Obama from the Punahou School yearbook identifying him as Barry Obama, not Barry Soetoro. If you would provide a link from his Punahou School days identifying him as Soetoro, I would appreciate it.
As far as the name "Barry" being evidence of a name change. I just don't see that as proving anything, I grew up with a boy named Robert but never heard him called that. When he was little it was "Bobby", then sometime in jr. high it became "Bob". In fact, most kids I grew up with had nicknames. Annette was Nettie, Kenneth was Kenny - you get the idea.