what's with all the print screen biz?
just image size it to match the width of the new size,
use canvas size to match the height,
then unlock the bg layer,
move it around where you need it... what looks good to you in the canvas size left.
then use save for web to get the file size you need.
for the thumbnails.
in the file > automate menu
there is a thing called "web gallery"
it produces thumbnails and html for a web gallery of images you select...
trash the html and save the thumbnails it produces for whatever needs you have.
