How can you share drive without reinstall xp?
You want to share a drive in network, you do not need to reinstall xp at all. If you want to share with another operating system, then you need to create at least 2 partitions on for xp another fro another opearting system. If you install 2 OS in one direction it will cause win xp stops to work properly, and you might loose all your data on that partition.