@erico, about the bump... I do sometimes another texture not excatly the same, for put scractch and dust and all this details... About the specular, this can be great... I have to study how do it whit OpenGlES 1.0, in OpenGL standard, in a PC I think can´t be too much trouble...
@Matchy, about the sounds I send a couple of sound from a library adquired someweeks ago, very very impresive sounds, after you can chosse a program like Music Maker, for add amd make ambiental extrange sounds, it´s have a strange synthetizer automatizated and very easy to use...