What training resource??
What type of file are you opening in FrontPage- you can open HTML/HTM, JS,
ASP, ASPX and CSS files in FrontPage (generally all/most of those associated
with websites).
If you give us some more information (such as a link to this "training
resource" you refer to), we might be able to assist you.
FP won't (or likely will not) open excel or word docs if that's what you're
asking; it's a web page editor, not a word processing tool or spreadsheet.
It deals with plain text files.
HTML, JS, ASP, ASPX, CSS are all text (ASCII) files - readable in a text
editor like notepad.