This story and the archeologist himself have actually been disputed for some time now. Most of the claims he makes have been proven false by other scientists and geologists and many of the names he drops have denied any involvement in his project. Below is a link from Archology.org
Bosnian "Pyramids" Update
And here is an excellent account and analysis by a group that visited the site and went through all the info with a fine tooth comb.
Article on metafysico.org