Help part one: A better place to ask would probably be in the Inventor subforum, located at
http://www.chiefdelphi.com/forums/forumdisplay.php?f=57 due to exposure and expertise hanging out there.
Help part two: You'd have to convert it to a different file type, then open that with Inventor 2008. My memory is fuzzy, but iges or step would probably work. As you've probably discovered, Inventor 2008 (or previous) doesn't exactly like Inventor 2009 files, and this holds true on up the line. So you go to a "neutral" file type and then to Inventor [insert version here] or Solidworks [insert version here] or another CAD program of your choice.
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Past teams:
2003-2007: FRC0330 BeachBots
2008: FRC1135 Shmoebotics
2012: FRC4046 Schroedinger's Dragons
"Rockets are tricky..."--Elon Musk
