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Problem about bump map with include specular light or two light

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From "http://www.paulsprojects.net/tutorials/simplebump/simplebump.html" how to do that if ... 1) i want to include specular light , //Set up texture environment to do (tex0 dot tex1)*color glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB); glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE); glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_REPLACE); glActiveTextureARB(GL_TEXTURE1_ARB); glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB); glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE); glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_DOT3_RGB_ARB); glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB); glActiveTextureARB(GL_TEXTURE0_ARB); glDrawElements(GL_TRIANGLES, currentCloth->numIndices, GL_UNSIGNED_INT, currentCloth->indices); from code if i want to combine stage0 with stage2(assume for specular stage) and after that add with current output (stage0 dot stage1). how can i do that? 2) i want to add another light. My understranding is i must draw first primitive and disable all data(such as vertex array, coordinate array, ...) and recreate data for another lightand blend them, right?

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