Hello, I am looking to make a mac tech drive with 10.4-10.10 instal and recovery partitions. What I mean by recovery partitions is that I would be able to boot into those partitions to look at the persons computer. I would also like to make an applications and support partition with the remaining space on the external Hard drive. I am wondering how I go about installing them on the drive and how much space I should leave for each OS. I have all the OS's. I have a 500GB HD but I don't mind buying a 1TB drive. I would like to leave a good amount of extra space for the applications and support. Also if anyone has any good recommendations on applications that can see what is installed on the HD. I know there is a good app out there but I forgot the name. also if there is a good app to help take duplicated information off the computer. Would Disk warrior help with that? Thank you in advance!