You try photobucket? If not, it's a commonly used site to post pictures to GW. Sign up for a free account. Create a photo album (keep that album "public" for access reasons), and upload pics to the album. Then, you can either link to the album or use the "html copy" button to copy the html code into a GW forums post. Just add a separator line between html code sets to create a space between the pictures.

Easy as pie,
Bryan