These forums also have a member album where you can post pics. Go to "User CP" then on the left under "Networking" there's a link for "Pictures & albums". Super easy.

Also if you use an image hosting site like photobucket, they have links under the pics to copy the url for various posting methods like email & forums. You want to copy the IMG section, it automatically posts the pic in the message(certain sections only like grow logs) instead of a link. If the IMG code is OFF for a section you're posting in(like indoor growing) it'll still post it as a link. Oh, & make sure to resize to something like 400x600 before posting or people can get mad with a gigantic pic in there lol. Photobucket has an option to automatically resize your pics when uploading or you can manually do it after.