phpBB

ae galera alguem pode me ajudar a instalar o phpBB localmente, ja estu com o PHP 5.0.3 instalodo e rodando redondinho, mas só que ná hora de instalar aparecem o seguintes erros.olha como eu to fazendo:1ºhttp://localhost/phpBB/, mais ai fala que eu não tenho permissão pra acessa-lo

ForbiddenYou don't have permission to access /phpBB/ on this server.

2º http://localhost/phpBB/install/install.php, tento ir direto no arquivo de instaloção ai da esse erro:

Warning: main(./../extension.inc) [function.main]: failed to open stream: No such file or directory in c:\wwwphp\phpBB\install\install.php on line 297Warning: main() [function.include]: Failed opening './../extension.inc' for inclusion (include_path='.;C:\php5\pear') in c:\wwwphp\phpBB\install\install.php on line 297Warning: main(./../includes/constants.) [function.main]: failed to open stream: No such file or directory in c:\wwwphp\phpBB\install\install.php on line 305Warning: main() [function.include]: Failed opening './../includes/constants.' for inclusion (include_path='.;C:\php5\pear') in c:\wwwphp\phpBB\install\install.php on line 305Warning: main(./../includes/functions.) [function.main]: failed to open stream: No such file or directory in c:\wwwphp\phpBB\install\install.php on line 306Warning: main() [function.include]: Failed opening './../includes/functions.' for inclusion (include_path='.;C:\php5\pear') in c:\wwwphp\phpBB\install\install.php on line 306Warning: main(./../includes/sessions.) [function.main]: failed to open stream: No such file or directory in c:\wwwphp\phpBB\install\install.php on line 307Warning: main() [function.include]: Failed opening './../includes/sessions.' for inclusion (include_path='.;C:\php5\pear') in c:\wwwphp\phpBB\install\install.php on line 307

alguem ai pode me ajudar a instalar o fórum.