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Try to install it. There's a reason they can charge for help with the install. I never got any further than that. I built a site on their demo system and played a bit, but if it's too hard for me to install, it's not gonna get much traction in the FOSS world. They are targeting WebGUI for commercial sites that are willing (expecting even) to pay for support.
I'm a refugeee from several other CMS systems and I finally landed here. It's gonna take a lot to dislodge me again, I'm tired of learning new CMS programs.
Dennis