Posting on the main site from the subdomain blog of the network

I woudl like to have 1-3 posts with pictures thumbnails from the site installed in the subdomain to be posted on the main page in one of the widetized section of hte theme. The screenshot you have for the postindexer is the result I woudl like to get. Can the postindexer or autoblogger plugin do this? Also what RSS plugin/widget I would need to use to display images as thumbnails.