Yeah, that the netbook will be encrypted is already in my thought-process (that's why I didn't write it explicitly ). And I think one could write a simple script that 1) wipes the USB medium completely
2) copies the old savings-wallet to the medium
3) runs the Bitcoin client and (if that's even possible) automatically generates a few addresses and saves them in a textfile on the USB medium

Though I think the last step is not possible afaik, but it also isn't necessarily needed.