Hmmm, I really wouldn't think so. All Macs have firmware that don't allow them to install earlier OSs than what was shipped.
If you really want to run Snow Leopard, you'd probably be best doing it virtually. Though it was a solid OS at the time, you won't see any performance benefits when it's running on newer hardware. Plus app compatibility for 10.6 is dropping all the time.
Just don't do it. As was mentioned before you're gonna have problems with app support, the system will be less secure etc. There are a hundred reasons not to do this. Maybe you should adapt yourself to the newer OS instead.
Also from macintouch, this post:
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.