To post the actual pictures within your post, you have to be a Premium member of the BB. That costs $20/year, and you also receive one free classified ad with the membership. Info on upgrading to a Premium membership is here: http://www.chronicleforums.com/Forum...ad.php?t=24314
Otherwise, you can upload your photos into a photosharing website, like Photobucket, and paste a link to the pictures in your post.
Or you should also be able to do a "save as" on your original photo, where you create a new name for the picture so you don't override the original copy. Click "options" then slide the "quality level" bar to the left until you can get a workable size after you save it--you might have to play with it and do a few saves until you get the right file size.