Yes, this can be done. Describe in detail exactly what you are trying to do and I'll write you a sample macro. Where should the values appear in the Word document? Which cell values will you be using? If you could .ZIP and attach some sample files that would make things much easier.
The basic steps are:
1) Set reference to Word library in your VBA Editor in Excel
2) Create a new instance of Word Application within your Excel project.
3) Execute your code on the instance of Word application.
Dim wdApp As Word.Application
Set wdApp = New Word.Application
wdApp.Visible = True
wdApp.Documents.Open ("C:\Documents and Settings\DocumentName.doc")
'ADD MORE CODE HERE