What you need is called upconversion. While possible, it's much harder than downconversion (going from HD to DV or other SD format). This is because for all bitmap based images (like all video formats are) scaling image size beyond the original size is a very destructive process. Compressor 2 has some very sophisticated technologies, that allow suprisingly good upconversion quality, at the expense of unbelivable long processing times. If waiting for many hours or even days is not a probem, that's the way to go

All the best.
Adolfo Rozenfeld
Buenos Aires - Argentina
www.adolforozenfeld.com