This is a step by step instruction on how to create a topic and add a replay to the this forum. I recommend you read the http://www.playdota.com/forums/12294...s-forum-rules/
first and I also suggest you read http://www.playdota.com/forums/12306...hero-matchups/
to help your presentation.
Go to the replays section of the forum and click "New Topic".
Insert the correct game prefix from the drop box (casual, inhouse, clan).
Add a descriptive title.
Add a thread description tag making sure to note the correct format so others can navigate the forum easier e.g. [6.64, 1.24b, RD]
Add your match summary in as much detail as you like. The more detail you use the more likely someone is to download, watch and comment on the replay. Make sure to use the spoiler tags where appropriate.Colour coded hero matchups
can also assist in making your presentation look good.
To attach the replay click "manage attachments" and a box will pop up.
Click "Choose" to open a computer folder.
Locate your warcraft 3 replays folder and click the game replay you want to attach.
Click "upload" to attach the file to your new thread. This may take several moments depending on your computer and internet connection.
Click "Close this window".
Once you have finished everything and revised your new thread to make sure it is all correct you can click "Submit new thread".