are you trying to add contacts or numbers easily with the keyboard on the pc or something??
Or why else would you want to edit the pim backup file.
If you wanted to use the pc keyboard for data entry into the ppc you could use Mymobiler.
Mymobiler does alot of stuff including controlling the ppc from your pc and taking screenshots.
You can download it here.
http://www.mymobiler.com/
Hope that helps.