You can hard-code it if you want (we'll gladly tell you how), but you shouldn't have to at all. There's a few things that can cause the new user redirection to not function properly. First, make sure you have it configured correctly:
* Set "Enable Returning User Redirection:" to Yes
* In the New User Redirection drop-down, select the location to go to. It's fine if it's in a menu that's not exposed to the user through a module. The menu item does need to be published though.
If that's configured right, you'll want to make sure that no other User or Authentication plugins are trying to redirect the user. We perform the redirection after all authentication and user plugins have been triggered, so if you already have another User plugin that will redirect the user, this will take precedence.
Finally, if that doesn't work, or narrow it down, can you tell us where the user is being redirected to? That may help figure out what's going on. And if none of that works, we'll tell you how to hard-code it. We'd rather prevent you from having to do that so that in the future when you upgrade, you won't run into the same issues.
Thanks!