mac network questions

[hank smith]

hello I have 3 mac networking questions
1. how do I network a mac to a windows xp box and have it automaticly show up 
when booting up or when I come with in range of network? I guess that is a 2 
parter.
second question.
2. how do I network 2 macs togeather? this one is from my friend.
3. how do we share files from mac to mac? another question from my friend.
thanks
Hank