I have problems with the software I have (ulead) to burn those mpegs (can't remeber the extension) that have seperate audio /video files. So I compress to .mp2 which has the audio/video in same file.

So my questions: can I burn an mp2 in dvd achitect? Sonic scenerist? Is it better to use the two file system, why? Can almost any dvd burning software burn the .mp2? I ask the latter because .mp2 is the archive format I use for home movies and what not. Thanks in advance.

The problem with MPEG is that the file extension (.mp2 in your
case) does not say ANYTHING AT ALL about what is really inside
that file. It could be mpeg1, mpeg2, video or audio only or
combined.

Generally speaking the authoring applications always supports
elementary streams (just the video [usually .m2v or .mpg] or
audio). Most programs also support program/transport streams
with combined elementary streams. The only way to find out
if the program supports what you are creating is to try it out!

DVD Architect 2 should read it, download the demo. Sonic Scenarist
is very picky about what it accepts or not. However, if you go
with DVD Architect 2 I would probably encode the AVI in that
program instead of in Ulead's.

Thanks Rob. I don't encode in Ulead :)
Just the dvd menu software is ulead, seems to only recognize the combined format. Thanks for your clarifaction on the files. Guess I better study the dvd thing.