The other day, a friend's powerbook refused to start-up and I used Disk Warrior 4 to bring it back to life. I found this program to be really valuable but I'm not going to bring a disc with me everywhere I go. I am curious as to how you can get the DiskWarrior program disk as a partition on an external hard drive so that if this happened again (and i had my nifty external with me) I could boot from it and fix any issues. Does anyone know how to do this? My guess would be to go into Disk Utility and make a new image of the disk and then drag it onto a partition on the external drive but i'm not really sure what format (.iso, .bin, .cue) to use.