SD, I'm fairly sure sharing is set-up on both sides. I have some functionality so I think I'll leave it as it is. Guess is still some kind of permissions thing (error-36). Next step is to connect the HP to the Mac.
Thanks to all for the assistance, I'm further down the line and have learned quite a lot in the past week. For a first attempt at networking, I'm quite chuffed with the result especially as it's Mac OSX 10.3.9 to XP Pro. Cheers!