Original Movie is perfectly fine
I can extract with VirtualDub or AVi2Wav and everytime after joining with new mpeg I get sound off by about 2 seconds...

Whose fault is it? VirtualDub? In this case what should I use? (I know about ac3fix)
AVI2Wav also has unsync problem...

What tools should I use join MPEG with AC3?
By the way How do I set up Gold wave to read AC3 from AVI?