How can I synchronize safely from more than one computer?

Question

First, I have set up my iPod to work with two computers: my primary computer, which is my desktop at home. Later, I also "authorized" my laptop (as a secondary source) to also be able sync to my iPod.
My question is that when I go to synchronize some podcasts I just downloaded to my secondary computer (my laptop), I get the following prompt: "Are you sure you want to sync podcasts? All existing podcsts on the iPod '<my iPod's name>' will be replaced with podcasts from your iTunes library."
From this message, since my iPod is plugged into my laptop, I assume it's referring to my iTunes library on my laptop (which only has the few podcasts I just downloaded). And it sounds like it's going to delete the podcasts that are already on my iPod.
I definitely don't want it to "replace" the ones I already have sync'd from my home computer; +_I just want to add the ones I have downloaded to my laptop._+ How can I make it so I can safely add the new ones without disturbing those I already have sync'd and want to keep? I'm a bit confused about how syncing works when you have more than one computer to sync to the iPod.

Answer 1

You cannot do what you want.
The ipod touch can sync with ONE computer/library at a time.
When you sync to a different computer/library, the ipod touch will first delete the current itunes content form the iphone, then it will sync the content from the new computer.
This is the way it is designed.