Firstly you have to prepare your photos. Trying to post photos straight from the camera just won't work - they're far too big. For posting photos in a forum, they need to be small.
Use a photo editing program (Paint Shop Pro, or the Gimp
which is free) to open the photo. Reduce the size to 640x480, then do a bit of sharpening. Save this as a new jpg file. This new small file is the one to upload.
Use an online tool such as http://www.picnik.com
. You can upload your photo, resize it to 640 x 480, apply sharpening (10 seems about right), and then save as a jpg (quality 8 is good).
Now, in a new post or having pressed "Post Reply" (not "Quick Reply"), you will see the attachments button (it's a little paperclip):
This will open the attachments window:
Click Browse and browse to the photo. Double check that the photo is 800 wide or less (640 is good) and less than 256Kb. Click on the photo name and press open.
Then press upload and the photo will appear in the "Current attachments". You can browse and upload several times to add several photos.
When you're done, press "Close this window" and the list of photos will appear underneath your message: