It should work for Empire. Not sure if DrDre has gone and tuned the script frame-by-frame, but Empire is pretty much the same quality T/C. Jedi is a much better T/C (doesn't have aliasing), so I'd be doubtful that the SR plugin will get much from it, but you never know. I actually have another film who's DVD would probably benefit from greatly with this script, so when DrDre's done and releases the script I'll have a look at that. As we've discussed, you really need a DVD that has considerable aliasing to benefit from it.
The drive-through in the Mos Eisley sequence posted above never looked great because it had something like 5 or 6 generations of optical composites in it. The SE version got rid of the old version entirely, and Lucas had ILM or whoever recomposite it from the original elements (hence why MikeV's doesn't resolve the detail in the SE of that shot).