How do i populate my Screen with a custom post-type and more than one from each site in the network?

This theme is very cool. and just what i am looking for… However, I have a custom post type in one site this is using a custom theme… I am trying out network on my MAIN site.. i would like to publish “events” and other custom post types to my main site home page… how do i do that? Further more. can i set it up to bring more than one from a network blog? and can i make Featured image mandatory for all networked blogs. or skip publishing a post that does not have a featured image. Curious. thanks in advance.