Just confirmed that the GPU accelerated rendering is only accessed via an AMD/ATI graphics chipset so this is the reason why the GPU accelerated rendering does not work for those with nvidia 3D cards.
Edit- continued search and also found this:
From what I have been able to learn the trial version of Vegas has a 30 day expiration. It also places a nag screen to purchase. Somebody with a trial version will need to post what the nag screen does with respect to Blue Ray burning.
Once you get your AVCHD "footage" into the timeline, you can render it to iso on hard drive only, burn BD-R and save an iso, and burn a previously saved iso. Those are your 3 options for iso files. Whatever you see on the output display window in Vegas is what's getting burned to the disk or in the iso file. If you see a SBS then you may not have properly configured it and it will not play properly. The trouble is with 3D there are so many options to configure your render that it would be a monumental task to address all options here. My game plan is to figure out how to handle each different format clip needs to be, test it, put it on the timeline and render. I already have a BD-R with clips in an edited test run that 20% were not properly configured. I ended up with 4 SBS images squeezed on the screen but later in the test I did it right and those same clips were upconverted to full 3D Blue Ray format and properly auto switched the monitor.
The biggest mistake you can make is to assume you are the expert, not the student and that Vegas failed to read your mind. You need to dig deep into the software's Help files as they are really vary well done.
It's OK to admit that editing is not your thing. The package is very powerful with many robust features. The learning curve is long, not steep for those with an edit background. For non editors, a simpler package like the consumer version Vegas Studio, may be a better primer. That and an introductory training DVD from VASST.
Petri- If one already has Vegas, what's the purpose of needing an iso player, especially one that costs money? I don't get that.