Letting users change pages' filenames

Howdy,

I just set up a client with a fresh MTOS installation to use as a lightweight CMS for a static website. I gave its several users a modified version of the "Webmaster" role so that they could create and edit pages without encumbering them with controls relating to blog entries (as this site isn't a blog).

One of the users discovered, to our mutual surprise, that they couldn't set the filename of a page to anything other than the page's title; if they changed the filename field and hit 'save', MT would go through the motions of re-publishing the page, only to reveal that it simply rewrote the page as whatever_the_title_is.html.

I found that that I could empower them to rename files freely by giving their role the "Edit Entries" permission, so this is what I've done. This has the unfortunate side-effect of activating several entry/comment/trackback-related commands under their "Manage" menu when using MT; I've told them to pay that stuff no mind. I'd rather just keep those commands greyed out entirely, though.

Is there a better way to do what I want to do, here?