Tinypic walkthrough.
Go there, press Browse.
Find the location ot the photo and press enter.
Press Upload now.
It may ask you to copy a Captcha into a bar, do that if need be.
When the photo is uploaded you get four choices under "Share This Image". Choose No2 "Image codes for Forums and Message Boards"
Copy and paste into the message.
The family which bikes together, stays together.