Step #1 Set a skillet or griddle over medium high heat & toast the dried red & ancho chiles (without any liquid), turning a few times until they are flexible & lightly colored (do not scorch); depending on your stove it may take anywhere from 1 min to 5 mins.
Step #2 Remove the chiles from heat & cool slightly.
Step #3 Stem & seed the chiles & tear them into small pieces.
Step #4 In a medium heat-proof bowl, pour the 2 c boiling water over the chiles.
Step #5 Cover up, stirring every once in awhile, let this stand, until cool.
Step #6 Drain the chile pieces, reserving about 3 tbsps of the soaking water.
Step #7 Preheat the broiler.
Step #8 In a shallow pan, turning them once, broil the tomatoes, 15-20 mins; the peels should be blackened.