Did you ever get the chance to put the textures into the indaiatuba.blend file. If you have the original directory structure for this project then it might be as simple as opening the indaiatuba file in blender and issuing the command File -> External Data -> pack into .blend file and then saving the file. I have some other examples of simple blender architecture projects that have been converted to X3D to view in a webpage at this site.
tinyurl (dot) com/3DArchitecture
Some of these examples were taken from the blender guru architecture tutorials from blenderguru (dot) com.