I have Photoshop CS and understand about using the alpha channels to make transparency, but whenever I try to save my spray it doesn't let me save it as a tga. Can anyone tell me how to either a) let it save as a tga, or b) save it some other way in which it can be used
I've had this problem with GIFs. If I remember right certain types of source files won't let you save as certain other types. If it's an uncommon file type try converting the source image to a different format. Failing that you could always open an existing tag and edit it with your new image, then save as. It will already be a tga so it should save okay (just remember to change the filename).