When you have been working on a sequence and have adde quite a few video peices to it then realise that the sequence was the wrong resolution and has the wrong pixel aspect ratio is there a way to alter it without losing the work you've put into arranging video clips on the timeline?
Create a new project with the correct settings (frame size, PAR, codec, etc.). Then, import your original project into the new one, just as you would any other piece of source media. Once the project has been imported, open up the sequence. It will assume the new project settings.