Im trying to make a almost see-through scrum skin but whenever I try it on my game all it shows is a white scrum goal. Why is this so?

Is it a transparent file? If you just erase it it will erase white (default)...

Ok, this is kind of bumping this thread but here: http://supra.planetthinktanks2.com/archives/comm-thread.asp?thread=7526&forum=11
Dr. Sawbones says that he erases the leaves on his trees by changing the file to solid black. Try it, it may work.