Can you explain what you did, what's happening and what you're trying to achieve?
If you set up a user account as a template that you want new users to start from you just have to use the copyto feature in system properties, Advanced tab, settings button in the user profiles bit to copy the 'template' user account over the default user account. Obviously you have to perfrom this from another admin user and hidden files need to be visible. If you did this, and new users are NOT being created with template profile, there's something else at work (is this standalone, workgroup or domain environment?)
You can rename a user account - though it tends to keep its original profile name - and I don't really understand how this would help. You can also use the copyto feature to copy 'template' profile over new user profile once its been created - but the default user procedure should make this unnecessary.