If you only have the demo, then I'd suggest not buying this. All of these programmes use the code of Prof Helmut something-or-other. I use Hugin (
http://hugin.sourceforge.net/). It's a open source equivilent of PTGui and looks almost identical. It's a bit of a pain to install, but once you are there it is just as good. You can also use different stitching methods - some of them aren't very sucessful on large megapixel images.
Nice panorama by the way.
Rob
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East Midlands Underwater Photographers www.emup.org.uk www.robcuss.co.uk
Camera kit: Nikon D80 in Ikelite housing, Tokina 10-17mm, Sigma 50mm, Sigma 105mm, twin Ikelite DS-125 strobes