Sharing files between XP and OS X

I followed This guide to setup a network between my iBook and a friends XP laptop but it gives him full access to all my files obviously because he is connecting to my system under my username. I just want us to both have a single folder each which we can share file through, does anyone have a decent guide for his?

Thanks in advance.

Create a new user on the mac and have him connect with those credentials. use the shared folder in the /Users directory to share files.

question on the sharing..

i have two external hds on the mac. i'm looking to share that with the pc. what would i need to do for that?

getting a new router next week..

http://www.macmall.com/macmall/shop/detail~dpno~102407.asp

i also have a dvd burner on that mac... can i share that?
what about printers as well?

i know its a lot of questions.. any answers would help.. thank you

Unfortunately by enabling sharing on the Mac you share all mount points,...meaning all drives, firewire cd and even mounted dmg files.

So,...yes they will be shared.