See the C:\Program Files\Adobe\Premiere Pro 1.x\ReadMe file for important information about exporting to DVD.
JerryK said about fitting more than an hour on a single layer DVD:
I don't usually make my DVDs in PPro, but for the purposes of this thread I just went through the process and this is how I did it.
1. I put a 1 hour 57 minute clip on the timeline. 2. With the timeline window selected I chose File/Export/Make DVD 3. Under status was the message Not enough disk space. 4. I clicked settings, and then chose several presets one after another until status showed ready. 5. The preset that finally worked was NTSC DV 4:3 Low quality 3Mb VBR 1 pass.
There may be other presets, combined with adjusting the quality slider, that would also work. I did a first play dvd without a menu template or chapter points. These added goodies will take up some space on the disk and may affect the outcome.