Post as group when inside group.

Hi,

I have created a group into easysocial and what I want to do is :
1. When I click on group, the user logged in at top bar should get changed to the 'Group name' instead of 'Logged in' user.
2. When I share something in the 'whats new' the post should be posted via 'Group name' instead of the 'Logged in' user. Just like what facebook does with the groups.

Thanks in advance.