I wasn't sure exactly what he meant but I did manage to fix it. but I don't think his answer was my solution, I had to do something else.
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If your getting that same error as I did, all I had to do was delete some folders that seemed to be doubled. When the tutorial told me to UnPbo or was it DePbo, idk anyway, just after that step you get a folder that said something like Plants2_Bush, Plants2_tree. go to the folder after you remvoed the Plants2_ and you should see something like P:\CA\Plants2\ca\plants2\bush\data. and you should remove the second "\ca" and the second, "\plants2" this way it looks like P:\CA\Plants2\Bush\data and\or P:\CA\Plants2\tree\data and so on.
After all that try to redo the TUT_SampleMap in vistor and everything should be fine, I hope.
Try that for all the Pbo's that you DePboed and placed in the P:\CA\ folder. Hope I made any sense lol. :)