step by step

[Haggai Back]

Hello,
I've read a lot of questions and answers about that, but still could not apply:
I want to connect my parent's computer via Internet.
We both using XP
I have their ip as: xxx.xx.xxx.xxx,xxx.xx.xx.xx
Where should I write the ip?
Which ip? The first/second or both?
Do we need to open server/client before connecting?

Thanking you in advance...
I know there are many users, who asked the same question,
Please answer step-by-step process