how do i post full-size photos?

[gorilla]

i'm using image shack, and they only let me use thumbnail photolinks for my posts, and you have to load the full size pic seperately.
how do i include a page-width photo in my postings?

[British Red]

Its all explained here gorilla

http://www.bushcraftuk.com/forum/showthread.php?t=13734

Red