First of all, you should not use the save as option, since this will only save the project file. To make a DVD, myou need the RENDER AS option.
If you want to create an SD DVD, you should render to MPEG2 and use the DVD Architect NTSC video stream template (or PAL, depending on where you live, or widescreen, depending on your footage).
You can activate the TWO PASS option (under the CUSTOM button you will find a VIDEO tab where you can select the two pass option).
The audio should be rendered as AC3.
Theo