Yahoo Business Hosting doesn't allow .htaccess files?

I’m trying to set WP to appear in the root directory for a blog hosted on Yahoo Business Hosting but it won’t let me add an .htaccess file to the root or create one. Their site says this:

The PHP community has identified certain PHP configurations and directives whose misuse can result in insecure code. To help protect all of our customers, the following options will be disabled for all accounts beginning October 1, 2009:

* register_globals
* allow_url_fopen and its corollary, allow_url_include

These functions allow the developer to retrieve data, or open a file or retrieve file data, from a remote location, such as to load a site template from another file system. Note that for security concerns, register_globals is deprecated in PHP 5.3 and will soon be removed completely from PHP.

You or your developer can use more secure methods to accomplish the same goals. You may be able to rewrite scripts using allow_url_fopen, for example, to reference files locally using relative paths. You can also cURL to retrieve your remote data.

With allow_url_fopen and allow_url_include disabled, local inclusion using include(), include_once(), require(), and require_once() will still work normally.

Although we support the use of PHP with your site, we cannot help you write or debug your scripts. For help updating your scripts, we recommend that you contact your developer, review the PHP community’s documentation on register_globals, or visit the PHP Group web site.

You will not be able to edit your own php.ini or use htaccess to reenable these functions. For concerns about the impact of turning off these functions on your site, please contact customer care.

I plan to call them but I was wondering if anyone had experience with this already…