tga files

does anybody know a control that will display a tga or can convert a tga to a jpg or gif?

Surely, you should be able to draw a TGA file onto a form or a control.
In the Paint event, you can create graphics from the picturebox and create the TGA file into a Drawing.Bitmap. Then, use the Graphics .DrawImage method to draw the picture.
Also, with the Drawing.Bitmap, you can save it as a GIF or a JPG by using the .Save method of the Bitmap. :)