Well, in Sony Vegas, you import the video into a project with the native settings. So for Pal, you make sure it is 25 or 50 fps. Then you check the frame length of the video. Write it down. Then either change the project or import it into the project you need it for and again, set it to absolute frames and then use ctrl to drag the video to the correct length (at this point you don’t align it, just start at 0 and stretch it out to match the absolute frames that you noted. then you have to right click and select properties. Since you already stretched it, it should have the details under the Time Stretch/Pitch Shift section. Just check the box next to Lock to Stretch and the audio will return to original. Depending on your source there could be a tiny bit of distortion, so it is better to use un stretched audio whenever possible, but this has worked for me for all the PAL versions of the Star Wars movies in my effort to create accurate theatrical versions of the various editions.