Just go into the panel under Goodies and select "Htaccess/WebDAV" -- that will walk you through it.
Another option that might work, assuming the blog probably uses index.php, would be to create a blank index.html file in the directory, which would get called before the PHP file.
If during testing, any "home" links point to "/", rather than "/index.php", that will take you to the .html file--so just manually type in index.php to see the blog's index.
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