ok i want to gain access to the files on a computer in the other room from here. i want to do this just for the hell of it, and the knowledge i will gain from this.

i ran some scans and i have found out that the computer has 2 ports open port 139 witch is tcp netbios-ssn
port 445 also tcp microsoft-ds
its also running windows xp
i also have the ip (duh) and the mac adress but i dont know how that would help. i also have quite a bit of other info but i dont know how i could help. could anyone please tell me what i can do?

ps. the computer in the other room is owned by me. and i dont think i will be all that pissed at myself if i hack into my own computer. but who knows, i might be.