I'm trying to find a good DVD Autoring Software like DVDit Pro because DVDit Pro isnt letting me create my dvd it gives me a error saying the menu's aspect ratio changes and differs from the rest of dvd even though it's a 16:9 Mpeg.
So can anyone tell me any good alternate DVD Authoring software, please?

I use TMPGEnc DVD Author program and I am very please with the ease of use and it's performance, I am quite sure there are a multitude of programs available, just thought I'd try and help out.

My personal experience with DVDitPE is that if you option your new dvd project settings for 16:9 aspect ratio and your imported is recognized as compatible with the settings it will create your dvd with the chosen settings.

DVDitPE - Great application. Be sure your project settings right for widescreen.

There are Sonic forums where you can probably find specific help from very experienced users.
goodluck

If you can afford it, I recommend DVD Studio Pro, it has loads of creative features, and although its a little hard to learn, it gives you complete control over every single thing that happens