how do i get different theme

[poker4]

i downloaded the acid tech for my forum desig how to i get it to come up ,like what do i have to do to get that style in my forum

[CyberAlien]

If you are using free forum hosting service then there is nothing you can do about it because you don't have access to files.

If you are using normal web hosting then follow this manual: http://www.phpbb.com/kb/article.php?article_id=21