With XP installed, you might be able to partition the drive by using Disk Management but installing and booting Linux is another issue.. Open the control panel, then double click on 'Administrative Tools" icon, then the "Computer Management" icon, then click on the "Disk Management" listing on the left side. From there you should be able to create multiple partitions on the newly connected external hard drive.
Still, I'm not sure that you could create a dual-boot situation with the external drive. On the other hand, there are articles about how to do it..See the links below and let us know if it works:
Hope this helps.
Hi, I am new here.
How to partition a hard-drive attached externally to laptop. Can USB-HDD have an alternate OS (for example Linux)and can I run on my laptop alternatively which has pre-installed HDD with win-XP home?
This seems a great forum and I am sure, some expert will turnout soon.
Thanks in advance,