Yes.
you can't, sorry it doesn't allow it you can install Linux distributions on usb though :D
Install XP first. Then install Vista on the second drive. When the Vista installer sees that this is a second OS, it will automatically set up dual booting. When you boot the computer, you will be given a choice as to which OS to boot into. Before even starting, ensure the computer is compatible with bot OSes and ensure that you have the proper drivers for both OSes.
When selecting the drive you wish to install the OS on, simply select the external HDD.
120GB.
Yes, but as you have more space in your second HDD and as its not the main HDD it would be best to install it in the second "DATA" HDD :D
Change the hdd type from sata to ide. Change the hdd type from sata to ide. The only way to install XP over Vista is to first format the hard drive, thus removing all traces of Vista and clearing the HDD of any information that may cause a conflict. Once formatted, XP SHOULD install as it would on any new system. Alternatively, buy an Apple Mac and save yourself the trouble of continually upgrading a windows based PC just to line the pockets of Microsoft :)
You could put the installation file on the external HDD to install it on another computer but then to install it, it would have to be on a local HDD.
Carefully.
Two ways:First, you can install by removing the master drive and install the new program (OS) onto the second HDD as you would in the ordinary way. Second, you can use XP boot program (WinXP_EN_PRO_BF; use search in Microsoft website for this file; besure to choose either XP Pro. (assume XP Pro. will be sufficient for Vista) or Home Ed), download and extract the cabinet files and follow the instructions (you will need 6 floopy discs too, and the OS program and the rest will be done for you (format and all). During your reinstallation of the OS on your master HDD, there will be a screen to define where the new program (OS) to be installed, select the slave drive to install. WARNING: BE SURE YOU HAVE A BACKUP OF YOUR FILES (master HDD) JUST IN CASE THINGS DON'T GO THE WAY YOU WANT IT!!!! PS: In my opinion, I don't think this is possible because the master HDD will be in conflict with the slave drive based on the OS at boot up. A third option and best way would be that, you use XP on the master drive to install two OS. To do this just type in the search box of XP HELP AND SUPPORT; 'dual systems' and select 'Installing more than one operating system on your computer' and follow the instructions to install on the master HDD. Thus leaves you with the spare HDD to do other things with. And at boot up after you have installed the second OS you can select which one you want to start up.
Usually it's a BIOS issue. You can load a new BIOS by going to the web site of the original manufacturer and paying them a few dollars for the upgrade. It's relatively inexpensive and they give detailed instructions.
Usb, cd/dvd, network/download/, by Removing HDD (put HDD in secondary Slot in Another PC with its own HDD and Formet it).
you can have as much as ur HDD can had So if you want pring any 1 TB HDD and install 100s of OS's