Ooh you are talking to someone else technically challenged. You can resize it on flickr down to small (click on the pic and then on the all sizes icon above the pic. Then click on small where your pic will shrink and then on download small size). Then you need download the resized pic back onto your pc, somewhere where its easy to find like on your desktop or in your pictures. You can always delete it back off after you have posted your pic.
To add pics onto the forum you need to click on post reply (not fast reply) put your txt in what you want to say and then click on browse at which point your picture file should open up, once you have located your picture click on it and it should work. If you click on the preview button then a lot of txt should come up underneath. If it hasn’t worked you will get some red txt along the top of the message box.
Hope this is a little clearer than mud, I only rediscovered how to do this a few days ago when adding my pic to the “it’s me” thread.