Can I down load Microsoft word to my blackberry and use it as a computer with files and all

Depends on which Blackberry you have. Mine's an older one that will not allow it, but I do believe newer ones have a blackberry version of MS apps that can be installed on them.

Which model do you have and who is your service provider?

can i down load Microsoft word to my blackberry and use it as a computer with files and all
8700g

Here's the page of software available for that model that I got from Blackberry's site:
http://www.handango.com/blackberry/PlatformHome.jsp?siteId=1181&jid=A3E644399CXCCX8FC4BC86BDB56E6X33&platformId=5&bySection=1&catalog=40&sectionId=0&topSectionId=0&title=BlackBerry%208700g&osId=862

I see that eOffice includes Word and Excel. Browse the site a bit; maybe you can find Word by itself if that's what you want.