If you go to the "writer offices" near subregister office and ask for General power of attorney , they can provide you the standard format. It should be in atleast 20 RS stamp paper and you can use it for many other purpose also. It should be registed in the subregister office. It's just a couple of hour of work
Anyway you can not use this for any loans (even if they say so) ; Banks have their own format.
Hope this helps
Sameer