Thanks for your feedback friends.
ToelABM, I will be waiting for your tutorial, I would love to learn about VirtualDub which looks like the best conversion tool to me. I did use the codec you mentioned, but don't know why it came out larger than the original
Baker Bhai, I tried almost all of these converters, but the problem is the asynchorization between audio and video. How to get rid of it? That's the issue.
Mehdianis, You are right about the quality but I somewhat disagree with you in another sense. The reason I need to know this is that in case of 2-3 CD VCDs, I found it not convenient to share with having 4-6 different files with different names. I also found it no good to write a DVD for archiving. Rather 1 file is preferable to me. I normally don't watch VCD, as I don't have any players, I prefer to use computer in most cases...