I do not know. I have no experience with Windows 7, and cannot imagine how to perform this conversion without Besweet and eac3to. If I can find time, I shall convert the audio for you and upload it; then you will only have to worry about the video.
edited - I do find it strange that you have problems with ESB -- no matter how small. What program are you using to burn the AVCHD and with what media?