A followup to my post 4 above:
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The following info brought over from the great macintouch.com site:
Step by step procedure to install Snow Leopard in Virtual Box:
http://www.macintouch.com/readerreports/virtualization/topic4300.html#d21may2015
Another helpful procedure is here - scroll down to Samuel Herschbein's post:
http://www.macintouch.com/readerreports/...d23feb2013
Virtualizing Mac OS 10.6 Snow Leopard Server using Parallels, VMWare Fusion or Oracle Virtual Box:
http://macstrategy.com/article.php?114
Snow Leopard Server 10.6 available from Apple via this link:
http://www.apple.com/shop/product/MC573Z/A/mac-os-x-106-snow-leopard
Also from macintouch, this post:
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Some miscellaneous notes about Snow Leopard Server:
1) The Snow Leopard Server DVD includes the retail version of Snow Leopard Server 10.6.3.
2) You cannot install the retail version of Snow Leopard 10.6.3 directly (i.e. without virtualization) on any Mac with a Core i3, i5, or i7 processor. Even though the first Core iX Macs shipped with 10.6.3, that was a special, machine-specific build of 10.6.3 that is newer than the retail DVD version of 10.6.3. If you want to run OS X Server on a Mac with a Core i3, i5, or i7 processor, you must use a virtualization tool like VMware Fusion, Parallels Desktop, or Virtualbox.
3) Snow Leopard Client updaters will not update Snow Leopard Server.
4) To get a fully updated Snow Leopard Server, simply run "Software Update" from the Snow Leopard Server's Apple Menu, or, if you prefer, download the Mac OS X Server v10.6.8 Update Combo file. Note that, with either method, you won't be fully up to date until you run Software Update again, as there are a few bits and pieces that received updates after the Combo Update was released.
5) During the OS X Server setup process, you are given options for turning on certain services. You can choose to leave everything off, and aside from a couple of very minor cosmetic differences, the system will work just like the client version of Snow Leopard.
6) The retail version of Snow Leopard Server includes a 184-page manual (really!), so if you have any questions about enabling or disabling services, you'll find all the information you need in the manual.
7) Pro Tip: if you are very concerned about locking down a Snow Leopard Server installation from a security perspective, search the net for a very detailed and helpful PDF from Apple called SnowLeopard_Server_Security_Config_v10.6.pdf . (There also is a version of the document for Client installations - SnowLeopard_Security_Config_v10.6.pdf ) Apple had been producing these guides since the early days of OS X -- I have copies going back to Panther. It is truly unfortunate that Apple stopped producing these guides once Lion was released.