How to remotely access my computer through a broadband internet connection?

Bad Dude

Diamond Member
Jan 25, 2000
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Hello all,
I want to share files with one of my friends using my broadband connection. I got Windows Vista Ultimate or I can use Windows XP Pro for that matter. I want to set it so he can access the files at any time through our broadband internet connection.
Please show me how and any link would be greatful.
Thanks.