Grayhem,

see my post in your other thread.

yes you can choose which specific frames to render.

the drawback is that hypervue render farm requires someone to be logged onto the computer and NOT LOCKED in order to use it to render.  THEY MUST NOT LOG OFF before the render is finished, or all images made on that machine will be lost.  Vue, eventhough you choose to render to .jpg, does some post-processing to the images to convert them to .jpg and saves this to the very end, so if you log off, it will lose those images. 

if anyone knows how to recover them I'm all ears!

Yes, you can 'abort' the render mid-render as it were, and it will ask you if you want to keep the images rendered so far, choose 'yes' and it will do the final processing of them and make them into .jpgs or whatever format you chose.  I don't think this works if you try to render directly to .avi.  not a recommended route to go.