I use a free image hosting site; postimage.org, it takes very little time to get up to speed on this type program. You upload your photos to the hosting site, then you can select the format for individual photos to post on the S&W Forum with the little yellow box above, (Insert Image)
"Go Advanced" below the "Quick Reply" window.
Scroll below the text window and "Manage Attachments".
Follow prompts to attach up to 5 photos from your device's photo library.
I'll take the extra step of opening the thumbnail, Ctrl C the address then click the little yellow square (Insert Image) and Ctrl V at the prompt. Cell phone pics I email to myself then open with Paint to resize.
I take them with my cell phone. Then I mail them to myself so I can get them on my big home computer in the pictures file. After that do what rwsmith says through manage attachments. They come up as thumbnails which can be clicked on for a full-size picture.