It's easy using Photobucket.
1.Open an account at Photobucket (it's free).
http://s5.photobucket.com/
2.Upload your photos as instructed.
3.Have this Forum open on one browser page and your Photobucket album open on another page, so you can flip between them.
4.Each photo thumbnail in your album has a three line gadget in the upper left corner.
5.Hover the curser on that to open the actions menu.
6.In there move down and click on Share.
7.This pops up another gui with Photo lLinks options.
8.You need the Direct one, so click that.
9.The link turns yellow to confirm it has been copied to your clipboard.
10.Come back here and type out your text in the message interface.
11.Place the cursor where you want to insert the first photo.
12.Go to the tools bar at the top of the Message box and click the Insert Image button (the small yellow square with mountains & sun scene).
13.This pops up the add image URL gui.
14.Simply paste (Ctrl & v) the link directly over the existing 'http://' entry. (Ensure the existing code is deleted or your photos will have code tags on them).
15.OK this and your photo will appear in the message at the place required.
16.Just continue typing as normal, adding more photos as required.
17.When you're happy with the layout, post the message.
You'll find the best visual layout is given with photos around 800 pixels wide. Most cameras take much larger images and cause the forum page to be too wide for many monitors. Before uploading to Photobucket, I usually re-size mine with one of the free photo editing programs. I use Photofiltre but there are hundreds around.