If you don’t want to enter the PID in XP Embedded Builder all the time you can have XP Embedded Builder to do this for you.

For this please do the following:

1. Create a textfile named PID.txt
2. Enter the Product Key in this file including the dashes (e.g.: AAAAA-BBBBB-CCCCC-DDDDD-EEEEE)
3. Save the PID.txt to the root of a USB flash drive
4. Connect the USB flash drive to the target pc where you will boot XP Embedded Builder

Now every time you boot XP Embedded Builder with this USB flash drive connected the PID will be entered automatically from this file.