There are no free trial downloads for Microsoft Office 2000 Premium available at Microsoft's official website, as of 2015. Microsoft provides information related to the Office 2000 software suite for anyone who still uses it.
Microsoft offers free trial downloads of its most recent products on the Evaluation Center page of its website. The Office products available for trial downloads are Office Professional Plus 2013 and Office 365 ProPlus.
The key difference between the two software platforms is that Professional Plus 2013 is purchased in the traditional sense that customers pay one purchase fee to own the product, while 365 ProPlus is a subscription software.