You can download an ISO image of the Promotional DVD HERE  - (warning  - 280MByte file!).

Once you have downloaded the ISO file you have two choices:

You can burn it to a CD using most CD-burner software.  This will result in a CD which will play on any PC with a CD or DVD drive.  It will NOT play on a standard DVD player.

or

You can burn it to a DVD using a suitable utility.  (Not all DVD burning software will support burning an ISO image file to a DVD). A suitable utility can be downloaded HERE. (This is freeware - use at your own risk after checking the download for viruses with an up-to-date anti-virus package).  The resulting DVD can be played on any PC with a DVD drive or on a Standard DVD player.