want to import some AVI files into iMovie

This might sound like proper dense right, but I'm on the new Imovie and I want to import some AVI files from my desktop, just so I can re-lengthen the clips etc etc, when I try to import them it seems like it hasn't done it or I don't know where they are in the window!

I was pretty darn good with the old imovie - I am confused.
Btw this Imovie is the one with the gold star (it may not be the new one :S)

Help maaay?

Slllllllllllllllllllllllags