Hey all i have a program that I thought i would share with you, I have used for a long time with great results and no bad results, it will change ur .tga's to .jpg with one click.
What you do is simply copy/place the program in your screenshot's folder inside ur wow directory. then it should come up with the following screen:
i wouldnt recommend "adjust brightness" as, when i use it, my images gets too bright.
Here are the results from virustotal.com, as you can see, i did scan the .exe file and not the .rar
I know that it comes up as a trojan / worm or suspecious on two of the scanners, but i havent had anything on my computer when scanning it with infact those files, but of course they may be right and me wrong, but i dont think so.
I have uploaded the file as a .rar file meaning you will have to use winrar to open it. enjoy
ConvertShots.rar