the project file would need to be from 6.5 or later tp open in cs5.5.
i was able open it in cs4, so i resaved it and zipped it up. the cs4 project has a '_cs4' at the end.
there was one error message say missing plugin for basic 3d was replaced with the default, but that's pretty normal for old 3d project files.
here's the link:
3520_project.zip
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW