Hi, I am trying to keep my work files with me for of site access our IT folks will not let me access my desktop remotely. I don't want to use a laptop to carry to and fro either. Instead, I am thinking about booting from a firewire 800 disk (7200rpm), and functioning from exclusively. I can take the drive with me, whenever I need to have all data with me at a home machine more importantly I am hoping I can boot from the same disk on my home iMac and do what I need to do. I just tested it out for to see if the performance is acceptable I can barely tell the difference! (perhaps a bit longer to boot - but that's about it). My work computer is 27" iMac Core i7 2.8GHz with 8GB ram and my home unit is 24" iMac Core2Duo 2.8GHz with 2GB ram. Will booting OS X on two different machines and changing files get me into troubles down the line? I know that some applications won't like it as they look at the MAC id for license authentication. Any other issues that I should be aware of?