well, technically yes, you do need to edit reka.bmp
you might want to use the colour dropper tool, to pick the colours from the head itself. think of the head- morda.bmp as your skin colour palette. Also note, reka.bmp DOES NOT allow any colour changes. all it shows is lime green, white , grey and black. You might want to create a new bmp file under the same name, so as to bypass the colour lock feature.