How to install and use The open source Darwin OS

Is it possible to install and use the Darwin OS from Apples open source download area, and if so on what hardware would I need?

I'm not even sure if the OS is complete, all I can tell is there are a load of individual installer packages for different applications and subsystems, but no overall OS installer.

At one point, I was able to download and install Darwin OS from the Apple open-source website. I was able to download Darwin 8.0.1, which is the base for 10.4 (Mac OS X Tiger). _{If I remember correctly, it was around the time of Leopard (10.5). I cannot find the download link now, but it ran in single user mode, and I didn't continue on to installing an actual GUI.}

Found the link from here:
Darwin 8.0.1 (direct download).
And the other (older) ISOs.

You can also take a look at the PureDarwin project:

One current goal of this project is to provide a useful bootable ISO of Darwin 10.x and Darwin 9.x.

The "current" versions of Darwin are 12.4.0 (OS X Mountain Lion 10.8.4), 13.0.0 (iOS 6, and OS X Mavericks), and 14.0.0 (iOS 7), so these are definitely older versions. Darwin 10.0 is Mac OS X Snow Leopard/iOS 4, 9.0 is Mac OS X Leopard/iPhone OS 1, and 8.0 is Mac OS X Tiger/Mac OS X for Apple TV.

^_Source

I'm not sure if this is a good question for Ask Different, maybe Server Fault would be better?

My understanding is it's a complete UNIX server environment but there is no tech support available from Apple or anyone else, and generally the only people who know how to use it are people who contribute code to the project.

You should be able to install it on any x86 system, I'm not sure how. You'll get a standard unix shell on boot and have to create users and install some kind of package manager, then install Gnome or something. Window Maker might be fun.

I'd do it in virtual box personally.

You can probably get help from the FreeBSD community. There is a lot of code shared between FreeBSD and Darwin.