Ancient Greek typefaces

Dear Friends
I am a logician, but my starting point is a Hellenistic argument. Therefore, I have to write several Greek fragments in my ph.d thesis or papers.
I use Scientific Word to draft my works, but I need also Greek typefaces/fonts.
Does Scientific Word give the chance to write in ancient Greek by using (of course) accent and spirit marks?
How can I do it?
Thank you

You will want to investigate

You will want to investigate using Lambda or XeTeX to typeset your document.  The starting shell is different for each typesetting method, so you should probably experiment first to decide what best meets your needs.  See http://www.mackichan.com/techtalk/585.htm and the referenced articles.