I did some research on Google for you :)
If you want a complete alternative to Sony Vegas, here is the well known Lightworks "the professional editor for everyone" : http://www.lwks.com/
Otherwise, if you need an easy to use open source CD/DVD burner, you can use cdrtfe : http://cdrtfe.sourceforge.net/
There are many software that can do such things. Here are some links :
Feel free to ask me anything !