> The reason I ask as it seems that the Movie Studio and Platinum version both ship with DVD Architect ver 4.5 and that version 5 may be required to render in a higher resolution.
You are correct. You cannot create higher resolution with DVD Architect Studio. If you wanted to stay with DVD Architect, you would need to upgrade to Vegas Pro with DVD Architect 5 to get Blu-ray support for high definition which is a lot more money.
Personally, if I were you, I would take a look at Ulead DVD Movie Factory. You get Blu-ray authoring for about $49. If this is just stuff for your own personal use, it should be fine. Check out the trial and see if it fits your need.
~jr
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