Autodesk inventor 2008 info

does anyone know where a good site for downloading cad files, (stuff people made and uploaded) for Autodesk inventor 2008/ preferably the sheet metal files for making developments, i want to take apart someone elses model and learn how to do it. any info on this would be greatly appriciated.

I am in a mechanical design technology program at WITC technical college. I am not aware of any site where you can get free cad files. I might be able to help you out however. I am at school right now and i cannot log on but my username on this site is gravytrain so u2u me.