Coloring and some sort of gradient effect

I have two questions for two different icons by the way i use psp8

ok first question, how do you get the color for this icon:  made by beatkicks

second question how do you get the effect for this icon:  made by calicons . how i think they got the effect for this icons was greyscaling it and then adding a gradient but i'm not sure what gradient that would be, and i'm not even sure if that's the right technique. so some please help lol.