The program includes the 2013 versions of Word, PowerPoint, Excel, Outlook, OneNote, Access, Publisher, and Lync. These won't run on Windows XP or Vista, unfortunately. and you can't install them alongside an earlier release of Office, either. It's one or the other.
One potential small irritation here is that the 64-bit image is 769MB in size, so you may find your disc burning software says it's too large to save to a CD, and can't be burned to a DVD. If you have similar problems then the simplest solution is probably to use something like 7-Zip to extract the contents of the IMG file, then burn the contents to a DVD, just like any other data disc.
Download: Microsoft Office Professional Plus 2013