Greyford, go to photobucket.com, establish an account.
Upload you picture(s) to photobucket by clicking the big green "upload image" button.
After the upload click "Save" then click "Share" at the top of the thumbnail image.
A "Share This Image" window with then be displayed.
Click on the "Get Link Code" tab and under the "IMG for bulletin boards & forums" line, click the code in the "Full Size" field, make sure the code is highlighted then right click and select "Copy."
On the Club Polk forum;
Go to a blank reply text box in the thread you wish to post the picture and click on the yellow "insert image" button. It is in the row of buttons above the text box. (roll your mouse over the button's to see which is the "insert image button")
An "Explorer User Prompt" dialog box will be displayed. Place your mouse pointer in the "Please Enter the URL of Image" field then right click and choose "Paste." The image code you copied from photobucket will be displayed in field.
Click "Okay" button and voila the code is embedded in the the text box then add any text you wish and click "Post Quick Reply."
And there you have it!