Can you tell me how to install PhpBB2 with my hosting account..

I need information step by step.If someone could help with it. It would be grateful.

ThnX in Advance.In the meantime i will look through tutorials here on installing PhpBB2.

Short answer:

Sign on to your cpanel using sub-domain.trap17/cpanel
select 'pre-installed scrtipts',
select 'fantastico',
there should be a select-box or drop-down list available that says 'blogs' or something,
select that, scroll down (or up) to find the phpbb listed under Forums,
select phpbb, then 'go' to take you to an install screen.

There will be about 3 steps where you should have an Admin name and password ready, a name for the Forum folder, etc.
It is pretty easy to do.

Let us know how you make out...