Step 6: Formatting and Copying Files to the USB drive
At this point, the HP USB format tool should pop up. Select your USB drive from the list. You can select the quick format option to speed things up. Click the Start button to format the USB drive
*WARNING: All contents of the USB drive will be erased!
Once the drive is formatted, you should see a dosbox with files being copied to your USB drive
After that, the GRUB4DOS utility should pop up. This will put the required info onto your USB drive to make it boot to Gruub4Dos.
Click on the Disk radio button
Use the drop down to select your USB drive
That's it! Your USB drive should now be bootable to VistaPE!