im good on windows but mac is totally new for me. i have some questions if somebody can help me.. its mac book pro 1,1 c2d 1.8 wid 1gb of ram 1. which mac os version i can install on it? 2. i dont have its backup cd or dvd n i want a clean install. how i can? 3. how i can install windows on it? 4. i also have Dell n5110 ci3,2nd generation. 3gb ram, which one is good ? im very thankful for help..