Statement 1: it's not a perfect solution - just the fastest one, if you have any proposals, post it in the comments.
Statement 2: I didn't tested this solution outside my own machine:

• Gigabyte EP3-DS3L,
• Pentium Dual-Core E6300 2,8GHz,
• 4gb ram,
• nVidia GeForce 9800GT,
• ordinary SATA disc,
• Windows 7 64bit.

If you are lucky enough to acomplish this task on diffrent hardware - let us know.
Statement 3: We'll be using original dvd with Snow Leopard.

Steps

1. Download VirtualBox 3.2.

2. Setup proper enviroment
Run Virtualbox, then click "New" [Blue polygon] and follow standard procedure in creating virtual machine (I don't have to say, we are intrested in Mac OS X (64 bit) in our case).  In Memory window left size as it is (1024mb). Then select/create new Virtual Hard Disk.
Now it's time for some customizations:
Right click on your virtual machine's icon and select Settings, in System/Motherboard uncheck "Enable EFI", in Display turn on "3D Acceleration", in Storage tab add your DVD station  and check "Passthrough" (it prevent running into "reading error").

3. Download and burn Empire EFI 1.085 proper for your hardware.

4. Insert  hot and eager new cd into station and fire on your Virtual Machine.

Eject EFI cd and insert your Snow Leopard install disc. Press F5, wait a bit, press enter, then one more time and you should see familiar window. From here it's just piece of cake.

Final notes

I don't have enough strong will and time to investigate how to  setup bootloader properly (you have to insert EFI cd always when you want to start your new MacOS otherwise you get "Boot fatal error")  so I'm open for suggestions in this matter.

Good luck!