Upload to rapidshare or some place, put it in a zip maybe before uplaoding it. Then post the link for download/send a pm with the link in it. Or you can put it in a zip, go in advance options for a post, and upload it like that. <-- I think that method works. Other then that, I use https://www.rapidshare.com/
to upload multiple tga's in a zip folder.
Now if you are talking about sending a texture item and trying to transfer it over. go here http://forum.toribash.com/tori_utilities.php