to get to the faces and other you have to start a post and go to the advanced button at the bottom of the page there you can do the faces right at the bottom of the post. Below that there is additional Options this is where you can add an attachment. Push the manage attachments button. Apopup box will pop up this will enable you upload and attachment from your computer this is the top area. the next area is where you can upload a file from a url.
To do this you have to have a web hosting provider or a web site that lets you store stuff on their web server some thing like photo bucket. Alot of service providers will give you a bit of web space to store stuff on or build a web page on. you may have to get them to turn it on or you may have to turn it on your self by loging on to your account and finding the web space area.
I hope this helps a bit, there are may that can help you out so keep posted.

Bill