Hey,
As Akuma wrote you should try an USB FDD instead an USB key. USB key is only supported on newer notebook models but as far as I know USB FDD will always be supported.
Anyway, just for your information: You should know what you do. This is a tricky and risky procedure and in worst case you could destroy the whole ROM module but if you already have a new notebook I don’t think it’s a problem for you.
