@marine33: You can't paste photos from your computer, you have to post them to an online image hosting repository first. I use Photobucket - it's free. Take the photo, upload it to your pc, and convert it to a jpeg, if it's not already (open the BMP or whatever it is, in Windows' built-in Paint, then Save As a jpeg). A BMP that's 5.5 Mb will be half a Mb in jpeg. Post it to Photobucket. Click on the pic in Photobucket to open it.
On the right, you'll have four Links to Share This Photo. Click the second one, marked Direct, and the link will be copied to your pc.
To insert the photo here, click the IMG (for image) button, that's above what you're typing.
Press CTRL+V to paste the link and click the IMG button again to end the paste.
Sometimes you have to adjust the photo's size first in Photobucket, to make it smaller. Sounds way harder than it is; do it once and you'll be set.