Hello,
Look guyz.You are not getting what I'm trying to say.

Okay now consider me as a total noob who doesn't have any knowledge about this and wants to make the page as in the starting page [www.board3.de] and make such theme.

now tell me what shall I do?

Consider I have nothing.Not even a ...

Hello,

Well I have no worries about the theme

but I want a tutorial on how to install this type of theme

Coz it's a bit different from the phpbb3 type

Hello,

I wanna get myself the theme as in the index page of this site.
Please would you provide me a tutorial for this?

I have run phpbb3 forum and I know all its operations.