"how to post the ships pictures from trainworld.com" - im not sure what the question is but...

you cant single out the ships from tw.com because the entire window comes up as a picture.
You could save the whole picture, the crop out the individual ships, then refer to
nf-guides on how to put your cropped picture on the forums

he asked how to post images on the forums bill

On your keyoboard there should be a key which say Print Screen SysRq press that
key and it will save the current windows screen to my photos.

www.nf-guides.com