I use AspectHD v5 last build on my PC.

I have never been able to open my CF avi under Quicktime, and was surprised when my colorist was able to do it easily on his Mac after installing the free version of Neo.

Where can I get the plugg-in to be able to open my CF files with QT on my PC?

Aspect didn't include that component. Not sure that NEO Player does either. NEO HD and Prospect do for sure. Everything will get clearer after our PHD and NHD v4 releases -- we will even rev. Neo Player.