Hi,
because I’m a total nOOb in texturing or working with pictures I’ve created a little tool that splits RGB-Alpha-TGA’s into a RGB-part TGA and a greyscaled Alpha-part TGA (also a RGB but with greyscaled colors).
It can also be used to merge a RGB TGA with a greyscaled TGA (also a RGB but with greyscaled colors).
Example:


I’ve used Microsft’s EXCEL Visual Basic for programming this.
So you have to have EXCEL Version 2000 to use this tool.
If someone is interessted in the source I will post it.