Data Share in Virtualbox

1. Host: Debian
2. Guest: WindowXP
3. Virtual Machine Software: Virtualbox -1.6.6_OSE
4. Share fold: ~/shared
5. Fold name: shared
6. AdditionGuestIso: http://www.genunix.org/dist/vbox/VBoxGuestAdditions_1.6.6.iso. Note that don't use the item "Devie->Install Guest Addition", but mount the downloaded iso directly and run the setup.exe.
7. map to shared fold on Guest: net use x: \\vboxsvr\shared

Reference:

• Network & sharing in VirtualBox - Full tutorial 
• A Quick Start - VirtualBox Howto