How do you remove the front door panels on a 1998 Toyota T100 Extended Cab to replace speakers?

If the panels are like the 95 and 96 models, you don't need to remove door panels....carefully pop the grill covers off the door panels...there is a speaker mount behind the grill...remove the 4 speaker screws and your done. Start with the top of the grill and pull gently downward. There are metal clips on the cover and plastic hooks to the side which all hold it in place. Slow and careful is the name of the game here.