Atahualpa has "overidden" my sites custom 404 error page as specified in .htaccess. I discovered it has to do with the WP Permalink coding in .htaccess since if I remove this code, my custom 404 works as it should.
I have a large site of which WP is only a part, albeit an important part (it's installed in a /blog subdirectory). However, I'd rather have my custom 404 page with all my standard navigational templates used sitewide than the "404" (technically I don't think it's really a 404 page, though I certainly be wrong about that) generated by the blog theme which, of course, uses the Atahualpa templates.
How can I wrestle control of my 404 page back from WP/Atahaulpa?