2 columns in Pages, 1 column on Single Posts

Hi Ron!
I would say your theme Frontier is excellent for many applications. Thanks a lot for it to you!
I have a photography site and I would like to use Frontier as it is able to change sizes of photos automatically. There only are 2 small problems for me on the theme.
1) I would like to publish relatively big photos – 1400 px of long side. So I need to change layout of the theme: 1 sidebar on all pages but no sidebar in Single Posts.
2) I guess I need to make Wrap of Container wider – to 1440 px.
How it is possible to realize that? How to delete the sidebar in a single post and use Full Size template for single posts?
Thank you in advance.

Sergey