| Howdy again Gold,
Ok, on the same page you downloaded pepakura, you will also find "pepakura viewer", that will open .pdo files. (google search for pepakura viewer)
As for other suggestions other than pepakura, I dont know of any other unfolding programs out there for free.
If you want to try another 3d modeling program, do a google search for "anim8or" and d/l that program and the .pdf instructions too (instruction .pdf is about 100 pages, it leads you thru the process of creating things with the program). But you still have to use pepakura to unfold it.
sorry I couldnt be of more help,
Greg |