Producing SD and HD with DVD Studio Pro
If you are producing both a Standard Definition, and a High Definition project in DVD Studio Pro here is a very important piece of information to keep in mind. When setting the DVD Standard, set it to SD DVD first, author out the entire project, even build it. BUT, before you change the Video Standard to HD DVD, save the project with the HD suffix atatched, then change the Video Standard for that project to HD DVD. If you change a project from SD to HD, you cannot change it back. If you need to build another SD DVD, you won't be able to reset the DVD standard. You can upgrade from SD to HD, but not the other way.
If you are producing both a Standard Definition, and a High Definition project in DVD Studio Pro here is a very important piece of information to keep in mind. When setting the DVD Standard, set it to SD DVD first, author out the entire project, even build it. BUT, before you change the Video Standard to HD DVD, save the project with the HD suffix atatched, then change the Video Standard for that project to HD DVD. If you 
