Is anyone know how to add in Microsoft word to Apple without changing the original program.
If you mean install Microsoft word or Microsoft Office to a Mac by using the 'regular' windows install disks, you can't. (Unless you're running both OS's and you could install one on the windows side.) Macs have their own install disks for Microsoft Office, it's a whole different animal when it comes to installing.
I actually like Office for Mac way better than Office for Windows! Plus its very compatible (even runs compatibility checks on your documents in the background and alerts you if there will be a problem)