PDB said:

Funny you mentioned that. I am no Harmy by any stretch of the imagination (no way I can do rotoscoping) but I do have a few old HDTV Aliens masters that I was going to try and substitute the frames back into the film. That way I can put the hole back in and the scratches on the window.

It's widely considered that the BD transfer of Aliens had fake grain applied to enhance the perception of detail. So with the proper color correction and a similar fake grain plate, I'll bet the HDTV frames would blend almost seamlessly with the BD source. :)