Yeah, put your apps on there, and move it around.<br>Just be sure if an application uses extensions etc, that they're present on both machines - this may require installing all the stuff on the external HD from one machine, delete, and do it from the other, you know.<br><br>I don't know if you can boot a firewire HD... it should work fine with OSX, but again, I don't know about booting.<br><br>HTH<br><br>Cipher13<br><br>