[MTUSUPPORT]

You can use MP3+G Toolz. I have just tried version 4.0 and it works fine. Just make sure that whatever you do, DO NOT use Winzip 9.0 with Maximum Compression (Enhanced Deflate). This option also gives you a Message stating the following, before you zip the file.

Maximum (Enhanced Deflate) compression may not be compatible with some older versions of WinZip and other compression programs. Click on "Yes" to continue or "No" to change compression.

This is the only setting that I can reproduce this problem with. We are working on adding some error checking to not allow this to be added. As at this moment we have no way to fix this problem.