When you click to reply to a post, at the bottom of the new window there is an "Additional Options" thing you can click on. Click on that and it'll expand the window a bit with an option where you can browse your computer for a file to attach. Click on that Browse button and then go to the folder on your computer where you installed the game - inside that there's a Saves folder and your saved game will be in there. There will be two files with the name you gave the game, one is just a picture of where you saved the game and the other is the actual save itself. If you can't tell which is which go ahead and attach them both to a post and I'll take a look for you.