Hi, could anyone tell me how can i attach my signatrure? Is this option not availiable for newbies? Thanks

Go down to Miscellaneous Options
And check Show your signature

The signature is available for everybody.
You can set it from your UserCP -> Edit Signature (in the left sidebar)

Or, visit this link directly : http://www.geekpoint.net/profile.php?do=editsignature