After installed Virtualbox and installed ur OS XP in it, the major problem is USB not recognized or cant be mount in virtualized OS..... I've been searching for the solution for a day.....at last, i've found this solution and it is effective for my lappy...
just coppy paste it to your terminal
sudo usermod -aG vboxusers
after you've done everything, you MUST RESTART YOUR LAPPY!!!! (IMPORTANT!!!!) otherwise u cannot see the changes!!!