Upload the image to a free photo hosting site like Picasa Web Albums or Photobucket. Then, in that site, go to the image you want to display and copy the web address (the URL) starting http://...
When you post on bhp, just surround the URL pointing to the image with "img" tags (highlight the URL and click on the IMG button is simplest).
For example:
Code: Select all
[img]http://www.google.com/intl/en_ALL/images/logo.gif[/img]
Code: Select all
[url=http://www.google.com/][img]http://www.google.com/intl/en_ALL/images/logo.gif[/img][/url]
Bear in mind that the larger the image file, the longer it will take to download (which can slow the board down considerably for those with a slow connection). A good size for images is about 750 pixels wide, which will accomodate most sizes of screen.
Whatever you do, always check your posting using the Preview button to see that the links and images work properly before posting.