Imovie -vs- Imovie HD

[albertfreestyle]

Ok, I am REALLY hoping you can help...
I imported my DV footage using IMovie on my PowerMac G4, with OS 10.2.8

I know have IMovie HD on my new MacBook Pro
I opened up the movie to do some editing...and a alert box says "opening this file may cause file not to open in older versions of imovie"

I clicked ok to proceed. Now I play the clip (without editing yet) and most of it is scrambled!

ANyone experience this also? How can I fix it?

 

[wmmk]

do you have any backup of the footage on the camera or on the old cpu?

 

[albertfreestyle]

no, i recorded over the tape...and sold the g4