Microsoft currently offers the 2007 version of SharePoint Designer for free. It's a perfect editor for working with iChapter template sites.
You can download this editor here:
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=baa3ad86-bfc1-4bd4-9812-d9e710d44f42&displaylang=en
This editor will support everything you need to quickly and easily edit static content on your iChapter website.