Go advanced when posting -> manage attachments -> select the replay files -> hit upload.
The replay can then be opened automatically by other users with the application tb.exe.
Oh, and obligatory backseat moderation: quick questions like this should be asked in the beginner's sanctuary. However, even before that, you should look for an answer in the FAQ section. Both of these are under the Support section of the forum.
Last edited by Stafegobehuge; Dec 6, 2011 at 04:52 AM.