Update 09/27/07: Now works on systems using Windows Vista as the hostPortable USB Pendrive Linux Persistent Tutorial:

1. Download QemuPDLv1.1.0.exe and run the executable. (Extract to a folder named QemuPDL)
2. Navigate to the QemuPDL folder and click the LaunchPDL.bat file to start running Pen Drive Linux from Windows

Main Menu Boot Options:

• Select Pendrivelinux Live to boot Live (doesn’t save changes)
• Select Pendrivelinux Persistent to boot using persistence (saves/restores changes)

Qemu Emulation Options:

• Ctrl+Alt (switch between Windows and Linux)
• Ctrl+ Alt+f (switch between windowed and full screen mode)
• Ctrl+Alt+2 (switch to Qemu Monitor mode)
• Ctrl+Alt+1 (switch back to Linux)

Default root password is pendrivelinux.

To set a new root password simply open a terminal and type sudo passwd root and then set the password you would like to use for root access.

The default Username is user. Default user password is live

Enjoy!

reference