FrontPage itself won't search these files using the WAIS search (the old FP
search enging) I believe. On Windows servers, FrontPage will rely instead on
Microsoft Indexing Services (Indexing Server in older versions of Windows
Server OSes). Indexing Services will then go and index various file formats
that it supports. For example, it will index Word files but not PDF's in
it's default configuration. There's a DLL file that can be added to Indexing
Services from Adobe that will add support for PDF searching.
You still can't really control how the file is indexed in either situation.
You cuold write an ASP/ASP.Net script though to replace the FP Search that
would allow you to better tailor how Indexing Services performs searches
against the data indices, but this can be a bit of a bear to handle.
Hope this helps,
Mark Fitzpatrick
Microsoft MVP - FrontPage