Sorry for the wait. It took me long enough! But I finally edited the US audio thanks to master131's recording/uploading and his friends DVD recording too. :)
I will post the download link to the MP3 and then link you to a guide or two on how to put it into notorious' encode (suburbanmum's recording)!
Download Links (with mirrors thanks to master131 ideas):
Even though the guide is about changing, there should be information about adding an audio track in there as well.
Here's an alternate method: AVI-Mux GUI, Link: http://www.alexander-noe.com/video/amg/ - the main purpose for this is the ability to name your audio tracks! It's a bit difficult to use at first, but it will become easier with practice. Don't forget to check out the Online Manual! Here are a few tips I got from it, click on the + sign to see the Stream Name and Language titles. Click on the Stream Name and push F2 on your keyboard to change or put in a name; pushing enter will not work to make it complete, you will have to click somewhere else in that window, like the white space. For me, I had to extract the UK audio first (right-click on the audio and choose Extract Binary) then put it in again along with the US track to make it work. Also, clicking on the Start button pops-up a window asking where to save it. It surprised me! :)
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