To remove/hide other accounts from Login screen, goto:
Code:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\UserList
and in right-side pane, delete the desired account names or just change their values to
0
Now if u want to login with that account, then simply press
<ctrl>+<alt>+<del> and enter the username and password.