Wow, You_Too just did it again! I just love this guy! Get this, he just sent me this PM:

I know I said I was tired, but I just had to try this before forgetting it!

I downloaded those preview videos of your slowing down Han's head motion, and I thought about this avisynth plugin I've used before called mvtools, which has a function called flowfps which can double the fps of a video. The plugin usually leaves either ghosting or weird looking artefacts unless it's a slow movement, like in that scene.

The result came out great and I'm going to give you both a lossless 25fps avi of the frames (rendered in after effects) and the raw frames, so you can use whichever suits you best.

And it's exquisite. While all my methods were just done by hand overlaying of frames at different opacities with or without sharpening, his seems to use some kind of morphing effect to create the new frames and it works! Video'll follow as soon as it's rendered and uploaded :-)