Have you seen the work that Womp Rat Press did in putting together Star Wars REUP? It essentially converts all of the Star Wars material to the Space rules, complete with advantages, disadvantages, and special abilities.
You can find it at http://d6holocron.com/downloads/gbooks.html
among other places.
I’ve always like the Star Wars scale rules, never cared much for the current system of assigning a number to scale and using the difference between things to modify rolls. It just doesn’t … “taste” … right….