Edit singlepost

Hello,

First of all let me tell you that you have done a great work on this theme.
I really love it.
But let me ask you something, i have used several themes and i had the chance to edit singlepost.php on them.
In order to edit posts' page on your theme,what should i do?
I would like to add adsense boxes and other content which will be visible on the posts.
As far as i can see there is no singlepost.php on your theme, so which file should i edit?
Thanx in advance