There's a thread on this somewhere that I got the answer from, but here's my non-tech answer. I downloaded a program called Infranview (you might wana do a search in the forums on that name to get the thread). Then, for screeshots I make in game, I use that program and open the file with the saved screenshot. I'm not sure what folder they are auto saved in, but its something like "screenshots" I think. Then you have to "save as" that file and give it a different name and save it as a jpg file. Then you go to Layo and open your journal. When you're editing your journal entry, at the bottom there should be a section to manage attachments. You can browse for the folder you saved your jpg in, and then download the file. It should appear on you post now if you preview your post.
Hope this helps *coughs* I'm about out of energy here.
Davidhoff