How To Change /WP-Admin Address – Ultimate Branding Plugin?

So this is probably very silly … but after installing Ultimate Branding and changing everything on the site to our company logo, it occurred to me you still have to access it through …/wp-admin. Would it be possible to get that path changed as an additional feature to the plugin?

And my real question would be what is the best way to do so without editing the WP core files?