I know what you mean Croshy.. I hate that thing too.. There's bound to be a .tga file in the pack files somewhere that places that triangle thingy on the campaign map. If I can find that and turn the alpha channel completely black, I could get rid of it forever. However, so far my search has been in vain I'm afraid..
Still looking though!
By the way, in case anyone missed it by just going to the third page instead of scrolling all the way to the bottom of the second, I might as well repost the 39th post in this thread here, so it's at the top of this page for easier viewing..