I first tried to render as an AVI but the media was too big to put on a DVD in architect.
You can give an AVI file to DVDA and have it do the encoding for you.
I then tried to render as mpeg 2 but got no audio.
You need to render an AC-3 stream (the audio portion) as well.
If you give it the same name as the video portion (eg. myvideo.mpg & myvideo.ac3) and put it in the same folder, DVDA will automatically load the audio once you load the video.
What do I need to get that much video on a DVD?
Render it out as MPEG & AC-3 streams.
For 1.5 hr. use the following bitrates as recommended by the bitrate calculator (note: this links to a zipped file) I use.
AC-3: use the default stereo template
MPEG-2: use the DVD Architect NTSC video stream template but customize it by clicking the Custom button and then the Video tab.
VBR: 7,700,000 / 6,600,000 / 3,600,000
CBR: 6,100,000