A FEW QUESTIONS WITH RPG MAKER VX

So im using vx. (Btw is rm2k3 a free program because i see it everywhere for free.) So i want to know if it is possible to use custom battle sprites in vx. Like in 2k3 i want to have a script or something that allows battle sprites different than the field sprite. Another question, is it possible to have the field music and battle music playing together. (Like in ffvii, the field music stayed playing even in battle at the beginning of the game.) I think thats it. Thanks people.