after you do that ..(ALT + PRINT SCRN only places the image on the "clipboard" so you can paste it) you have to paste it into a photo shop program, like adobe photo shop, paint shop pro, corel draw, etc... save it as a jpeg or BMP file... then when you upload it to a hosting site like photobucket. After uploading it will be assigned a web address... copy that address then in your post click on the yellow square that looks like it has a mountain in it (right here in your comment box) it will open a pop-up...paste your link in that, click ok, and there ya go. Just be careful with the sizes... people tend to flame you for over sized pics.