A nice guide with loads of useful information combined in one place, thank you. The part about the re-rendering of the movies for better widescreen support could be better though.
First of all, a few of the movies don't have to be touched at all, since they've been replaced by in-game cutscences by TSLRCM (for example ScnMov01.bik; Visas talking with her master). You can find an exact list somewhere in the changelogs. Skipping those videos will speed up the entire process significantly.
Also, most of the movies actually have a different format than the desired resolution. 1920x1080 equals 16:9, but the movies have all sorts of formats: 4:3, 16:9 and 2,35:1. So, simply re-encoding them to 16:9 will stretch the image. This can be solved by cropping the video files first (in the negative or positive), and then re-encode them at a higher resolution. Cropping can be done with the RAD Video Tools as well, by the way.