for ease of understanding, i am attaching a mouse 
clickable 
utility which will show the positions of ALL the 
letters
 
answer to your question is easy if you have already 
installed 
hindi language on your pc (and naturally some 
keyboard layout
for hindi from microsoft .. e.g. inscript 
keyboard)
 
you will need to run the setup.exe file which i 
will have to 
send/upload so that the 1handKeyboard is installed 
in the pc
 
then it is a simple matter to ADD that keyboard 
under hindi
in your Regional&LanguageSettings in 
ControlPanel
 
 
in case hindi is NOT installed already, it will be 
easier to
install hindi first (you will need the winXp 
Installation CD !)