Hiya - Lurahesch
I don't have an IT education either. I'm just a casual user but I'll answer your question about what they mean by unsupported because I read a few posts on here and had some discussions about it as well. Supported desktops are desktops that the staff feel are easy to use and configure, they also support PCBSD mime types.
Unsupported desktops, aren't as easy to configure (for new people) and will sometimes have compatibility issues, which will have to be resolved by experts.
That's why when you place your cursor on the Unsupportive desktops line in the Installer, a little balloon will pop up saying, "Desktop environments for experts"
True, you can find tutorials online, (which is how I learned to use openbox) and posts on other forums asking questions and receiving answers for them, however on the main, people with no technical knowledge will have much difficulty handling the unsupported desktops.
Another point is, yes Enlightenment is easy to use and you can just download themes and toys for it online. But the PCBSD staff couldn't get it to properly handle mime types, (which are application references for media and document types) and the E17 desktop had to keep being rebuilt at every update. This was proving too tedious for the staff to maintain, so they dropped E17 completely.
Fvwm-crystal hasn't been tested yet. They are fiddling with it now and it will be released with the RC2. It's a pretty easy to use desktop environment, I thought. It comes with plenty of themes, however making your own themes takes some work.
Also I had glitches with it in Linux Mint, but that was because of the program Zero-install which the PCBSD staff have removed.
On the main, Fvwm-crystal does offer a Enlightenment/mac like theme called Dock. It's pretty and FVWM-crystal always comes with beautiful wallpaper.
If you don't care about doing anything specially advanced, Fvwm-crystal should work fine. It does take a while to get used it's menu placement though.
So...if you haven't tried FVWM-Crystal, I hope you'll give it a go when the next release comes out. Also I stumbled upon another window manager which will be getting popularity in the near future. It's called Trinity, it's based on KDE (KDE 3.5 to be exact) and it's going improve on KDE 3.5 with new features and remove some of the glitches with old KDE. This means that in the future of the X11 desktop world, Trinity will be another place to go for eye candy. However again, it won't be for my hardware.