i'm going to be going on vacation soon. and i know if i had a macbook i could control my screen from anywhere in the world that has internet access. and i love this! but i dont have a macbook anymore and i'm stuck with a pretty good pc. is there a program (thats hopefully free.. but if not.... its ok) i could use to control my screen from a nother room, or from another location? or is it different because of two different OS's?