i prefer to play them using Winamp and the In_VGM plugin. I don't have a Megadrive anymore to listen

But, its better to have an entire collection on the computer anyway.
I prefer listening in this method to using MP3's for example, since I may sound mad... but I prefer knowing that the computers decoding the file in the natural way it was made, rather than just music data like an MP3.
I guess thats why I like other kinds of MOD, like IT, XM, S3M, MOD, etc.
I wonder if they'll ever be a tracker that'll play VGM/VGZ files so you can see exactly how it was put together?...