BuddyPress Fun Thumbnail Image

A few questions on BuddyPress Fun Theme.
I opted to show the Home Articles Block. I cannot get the Featured Articles images to display properly. How can i get the entire image, or a relevant portion of the image, to show on the Featured Articles. It self selects some portion of the image which can be a headless body etc....

Second question - with BuddyPress activated, how can i disable the "Search the Site" box with the drop down to search for buddypress members, groups, forums and blogs. I just want a standard search box in its place.

thanks
anita