Onerous? Another way is to simply upload them as attachments. using the "File Manager" link at the bottom of the edit window when you're making a post (you must be in the "full" editor to see the File Manager). That will allow you to upload pictures as attachments and if the file size of 75k or less (I think) then the pictures will show up within the post, otherwise larger files will show as links that must be clicked. But linking to a photo on a image sharing gallery, if they allow hot linking, it better because 1) it uses none of my hard drive space and 2) it uses none of my bandwidth. But either method is fine.
If you do link to an image on another server just post the entire URL to the IMAGE (don't make the common mistake of trying to link to a .htmp web page). The link must point directly at the image (end with .JPG for example) then surround the URL with the UBB Image tags like this:
<div class="ubbcode-block"><div class="ubbcode-header">Code:</div><div class="ubbcode-body ubbcode-pre" style="height: 34px;"><pre>[image]https://www.britishcarforum.com/ubbthreads/images/kb_brain.jpg[/image]</pre>[/QUOTE]
Which, if I do without the special code tages looks like this:
You can also click the image icon in the full editor:
then fill in the popup box with the URL to the image and it will auto-magically put the image tags around it for you.
By the way, to determine the URL of an image, right click your mouse over the image and look at "properties".
Hope this helps,
Basil