First of all, Log into your account.
Next, there is a box at the top that says "Upload Images or Video"
Just below it is a link to "add more images". Click on that and the upload boxes expand to five. Then on the first box, click on the "Browse" button. A Box showing your computer's files should pop up. Now find your pics. For Example, if your files are in the "My Pictures" Folder, double click on the "My Computer" icon, then the "My Documents" Folder, then the "My Pictures" folder, and then some icons should appear that are your pictures. (I don't know where your pictures are stored on your computer so the folders you'll have to click may be different. You'll have to find them using the above method) Click on one of your picture icons so that it is highlighted, then click the "Open" button. The path of the pic that you want to upload will be input into that little box. Repeat for additional pics you may want to upload. Once you have done this for all the pics you wish to load, click the big "Upload" button and sit back and wait. Depending on your connection speed and the number and sizes of your photos, this could take a few minutes to almost an hour to load. Once it is done, you'll get a screen saying "Successfully uploaded # of files!". And the pics should then appear on your Photobucket page.
Now that you have the pics uploaded, look at the Photobucket page with your thumbnails. Beneath each pic is a couple of boxes. One is labeled "URL" and one is labeled "IMG". click inside the "IMG" box so that all the words inside the box are highlighted. Then right-click and select "copy". Now come back to the reply box of the FSM Forum, click inside it so your cursor shows up in your reply and then press "Ctrl-V" to paste the words you copied when you right-clicked in Photobucket. It should automatically have the Image Tags on it, so all you have to do is click "Preview" to see if the pic shows up in the post. If you followed these instructions, it should.
Good luck, I'm hoping to see pics of this beast since I have one to build as well. I wanted to build my Vulcan for this build but couldn't find it in the stash, so I built the O-1 Bird Dog instead.
Bird Dog is almost finished. Once I get the decals and final coat on it, I'll post my pics.