Does this happen to anyone else when using Sony Vegas 6?
 

As a test for rendering you click AVI format and then click custom to change the template settings. It comes up and you can change the settings. But when you click mpeg 1 or mpeg 2 and click custom it doesnt come up. It did when I first installed the program. The weird part is I'm using a new computer with the new software. Thought I would ask here before calling and whining to support over there. Thank you.

dont use vegas but try installing powerdvd or similar to make sure mpeg2 codecs are installed

Thank you I know they are installed though because I installed it.