Open the originals .tga files with any painting program like photoshop or Corel draw first. ( I prefer Corel cause I know how works it )
When the image is loaded you will see the select tool working on.( like a square around the texture )
In Corel draw there is a tool to save the mask ( this is the alpha channel and it works for reflecting lights and other effects ).
then save the mask to your harddisk or any other place.
After that load your .tga file and load from the saved place the mask file with the same tool now you will see loading up with your texture the alpha layer a select tool appears rounding your .tga file.
Beware that the originals alphas are very bad, but you can try or see Bojan`s and Viper`s work.
Post Edited (09-10-03 18:14)
When the others says you are the best, the worse error is to start to believe it. - Juan Manuel Fangio