To post pictures in the thread look in the Additional Options" panel below the main "Thread" text panel.
The first two "Miscellaneous Options" should be checked which will allow you to embed media from hosted sites (like YouTube etc...NOTE: some sites protect their hosted media from being embedded to other servers/sources).
The second portion of the panel, "Attach Files," allows direct attachment of photos that meet the size limitation criteria (they can't be too big or the data would start to slow down the forum). This method allows the VDF to store a copy of the image for future reference (especially useful for posting pics and descriptions from eBay and CL or if the image gets "unhosted" from the original source -- for historical and market purposes).
[IMG]http://www.vintagedrumforum.com/attachment.php?attachmentid=47490&stc=1&d=1345648335[/IMG]
Click "Manage Attachments" and choose an upload option. Some hosting sites have protection (or additional digitial rights managment) on media / photos and will not display the images if you choose "Upload from a URL," in that case simply choose the "Browse" option and navigate to where the photo resides on your computer, left click the image file to highlight it and select "Open" or just double-click to insert the file path in the "Upload File from your Computer" text box, then click "Upload."
[IMG]http://www.vintagedrumforum.com/attachment.php?attachmentid=47491&stc=1&d=1345648352[/IMG]
The "Attachment Key" will provide information on the maximum file sizes that can be uploaded. Any upload errors will be displayed in the "Manage Attachment" panel.
"Preview" your final post before submitting, then select "Submit" when ready to post.
The images will be in the "Attached Thumbnails" section that viewers can click on for a larger version. If you want to embed the image in the post you can click on the "insert image" button (moutain/sun icon) and insert the URL and select OK.
I usually just left click the image link (file name) from the Current Attachments section and the copy the URL from the pop-up window address bar and paste it in the post where I want it to appear
[IMG]http://www.vintagedrumforum.com/attachment.php?attachmentid=47494&stc=1&d=1345648927[/IMG]
Highlight the URL and then select the "Wrap [CODE] tags around selected text, then type IMG over the CODE so the URL has IMG in front and /IMG behind the text (NOTE: the brackets must be around the text for the code to work = [IMG] I'd type both the opening and closing examples here but then it would think I was trying to stick an image in and give the little red X.
You can resize images to meet the size requirements a bunch of different ways, like using Outlook (email them to yourself and you should be prompted with options to rezie), use PowerPoint (Paste an image into a slde right click it and save as .jpg and it will auto shrink), use the "Snipping Tool" if you have Windows Vista or Windows 7, or try any number of photo editing software that is stock on the computer or that you may have installed (like Microsoft Photo Editor, or Photoshop / CS etc...)
Cheers!