How do I change the creation date of a clip?

I have a lot of old movies that I took with an early Sony digital camera in MPG format that I converted to .dv files so that I could import the files into iMovie. This worked very well except that the movies now appear in the event library as having been created on the date they were converted to .dv rather than the date they were taken. So a movie shot in 2001 appears in the 2009 calendar.

I found an article by Christopher Breen on the Macworld website ( http://www.macworld.com/article/136692/2008/11/changeimoviedates.html) that gave two suggestions on how to change the creation date of the clips, one by manually changing the clip name to reflect the date and the other using an application called "A Better Finder Attributes".

I tried both methods and the creation date of the movie does change but iMovie does not generate a new calendar to reflect the creation date as Breen suggests will happen. So if I change the creation date to 2001 iMovie does not create a 2001 year calendar with the clip under it, it keeps the clip in its original year but the creation date changes.

Am I missing something here? Is there a way to get iMovie to create the appropriate year and have the old clips appear in that calendar?

Thanks in advance.