I made this guide before for another forum but thought it would be helpful posted here.
Here's a quick guide for you I've mocked together. Others can use it in the future if they wish!
First of all head over to photobucket and log in. (On the basis of having an account - If you don't create one by going to "sign up")
After logging in press the "Upload" button on the top of the page.
Next up press the "choose photos and videos button".
From here a pop up will open where you can locate to the particular photo you want to upload. In this example I will use an old picture of my spit. To select multiple images just hold down the "ctrl" key on your keyboard and individually clicking each image you wish to upload.
When done press "open" and then it will start uploading the images.
This will display when all images have been successfully uploaded.
Press the view uploads button to go into your "bucket" on photobucket. (This image shows the picture I just uploaded.)
Select the image you want to put onto the forum and then on the right hand side of the screen you will see some links. You want to press the IMG one as displayed.
It will say "copied" when you press inside the box. This means that the link for that photo has been copied and is ready to paste onto the forum.
Then go onto the forum and into the reply section as you normally would. Click in the reply box and right click then "paste". Or hold down the "Ctrl" key and then press the "V" key.
When you post your reply the image will automatically display. However when just in normal reply mode you wont see the image displayed, just the code.