First off, you need to upload your pictures to a website or server. In order to link to a picture, the picture must have "online presence." You can either upload an image to your own personal website or to a site like photobucket.com, shutterfly.com, villagephotos.com, miamihost.net, myimgs.com, walagata.com, or some other image hosting website. You can do a google search for "Image Hosting."
THEN, after you have uploaded your photos, it's time to POST them HERE!!
Just copy and paste this code -- and REPLACE THE "www.imagehostingservice.com/imagedirectory/imagename.jpg" with the actual property info for your picture. You can find this by right-clicking on the picture (from the hosting service website) and click on properties. There, the url to the image will be displayed.
And there you have it, a picture posted on Girlmom!!!