We tried this as well, but the races are still enabled on the character creation screen. The race-disabling through the config file seems to work on my server (although the values I use aren't what the Trinity documentation says to use), but I couldn't get it to work on this guy's server. I assume you could just rewrite the AccountCreation.lua/AccountCreation.xml, or whatever they're called, files to only allow Belfs, but I've only got half a clue how to do that and he definitely doesn't know how.