Hi Graeme; the forum actually had some storage for uploads, but very limited and now full.
The way to make your pix appear as if by magic is to set up an online photo storage account.
I use Photobucket, because it's free, and because it's functionality is extremely good.
You can start here, by creating an account:
https://secure.photobucket.com/register?returnUrl=http%3A%2F%2Fs21.photobucket.com%2FOnce you have done that, you can start uploading your pictures.
Tip, give some thought to creating some albums, and how you would like them arranged before uploading. If you move a photo to another album after having posted a link to it on a forum, that link will be broken, and that's a pain, because nobody can see your photo, and only you can fix it by editing your post to show the new location.
Tip 2, resize your photos before uploading them. Typically, you want a file size smaller than what came off the camera, otherwise your photo will be far wider than the screen. I have a 7 megapixel camera, and usually resize to about 25-35% of original size before uploading. Saves storage space too.
Once you have uploaded your photos, they will appear in your album. If you hover your cursor over the photo, a number of options will pop up.
Choose links, and then click on the box beside IMG.
The location of your photo will be copied onto your clipboard, and you can paste that directly into your forum reply.
If you haven't done anything like this before, it probably won't be as simple as that, but if you get stuck, just shout...
If I get time, I may create a thread on how to post via photobucket. We had that on the old forum, but Photobucket's changed a lot over the past year, so it needs redone.