Page 1 of Change tunes on an Ipod from any computer-Help!!!

Hi
a friend has asked me to update her i pod with new songs and remove some old songs which are currently on the Ipod but either im stupid or it cant be done
I already have i tunes installed on my PC (used for a jukebox ony) but when i plug in the IPOD it doesnt synch.
I try loading the CD that came with the Ipod, once it has gone through the basic set up it says Ipod needs to be reformatted Ipod updater 2005-02-07
when you press update it gives you 2 more options

Update - puts the latest system sofware on your Ipod
restore- completely erases your Ipod and restores factory settings, all your music will be erased..

The `update` function is not available I can only restore which will meen I will lose all the music currently on there.
Am I doing something wrong??? all i want to do is remove a few songs and put new one on there please help...
please note I am not using the original computer the tunes were put onto the Ipod with

I have Itunes 4.7
Windows XP
a mini Ipod

and a sore brain......

This item was edited on Tuesday, 12th July 2005, 23:33