Well if you find a picture online, there is no need to save it to your machine, because then you would need to upload it so it is online again. You can't show a pic that is saved on your pc itself (it wont show).

So, if you find a picture online, you have 2 options:
> right-click (with mouse)
> select "properties"
> copy-paste the link location of the picture (on the website in question)

OR
> right-click on the image
> select "copy image location" (on the pop up box)

Since the image is already online, you can include it in your post by adding the tags

For example:


So, the basic thing is just to save the link location, paste it between the tags.

Dunno if that helps...