Geck object effect shaders

[StupidAnswer]

Just wanted to ask this quick question before i go out, In the mod im making there is a little minigame of sorts that at the end fills up empty jet vials, the game itself will use the random percentage command to tell the player what to add. But my problem is, is that i would like the player to place the vials by activating a see through place holder like in wasteland defense for example( not moving it around just the effect), I thought to use a texture set but I cant get the alpha channel to work, is another way to do this?