to put up a sheet
1) Scan it. If you open your pictures folder, you'll probably have the option to scan it on the toolbar or sidebar or whatever
2) save it...
3) Open a reply and one of the little tools in the toolbar thing is host an image. click that and then browse for the picture. When you select it, tell the thing to upload.
4) When it does you are given 3 urls. Pick the second one that just says image and copy it
5) click the other picture tool that says insert and paste the picture
bam
this is only 2 so ya, i dont have the others