Okay, to post a replay instead of using the quick replay box where you would normally make your post, you have to use the "post reply" red button, after this you will see a a normal textbox, go below it to find a "manage attachments." Now click on this and click "choose a file"/"no file chosen" (I'm not sure which it is now) To find you replay, go to my computer, then you should find a hard drive called ********* (C
The stars could be anything. next find the folder in this drive called games, open it, you should find a toribash folder, once again open it, then in your replay folder you will have all your replays