Go to Photobucket.com on your computer
and create an account
Then download the photobucket App from the app store
Take a picture with youe Iphone
Open the app and go to "upload media"
Click on choose existing, then pick your photo and hit upload.
Wait for a bit, and your picture will be uploaded to photobucket.
Go to "my albums" in photobucket, click on the photo you want to upload to ADVRider.
on the bottom right you will see a small i in a circle. Click that
This screen will come up
tap once on the "img" link code ( bottom one). It will copy the link.
Go to ADV rider in your Iphone web browser. Go to the thread you want to upload a photo to. Click on new reply. Tap the screen where you would type in text and you will get the option to paste
Add any relevant text and
then click on preview post to make sure everything worked. If it did, click on Submit reply and you are done