Random images only from the recent posts

Hello, I installed the gallery plugin but have 3 issues:

• Can I get only one picture from each post?
• Can I get thumbnails also from older posts? Currently it is showing only the recent posts?
• Can I get paginated results?

You can check current result here: http://firm-guide.com/gallery/

Thanks for your help

http://wordpress.org/plugins/random-images/