Hi 007,
you need to do anything, Aptistock has the inbuilt ability to download all stocks from both nse and bse, follow the below steps
open aptistock
in the download menu choose update stock list (last one in the drop down)
this will open another window with a listbox, scroll the list, in the middle you will find both NSE and BSE, select the checkbox for both NSE and BSE and choose ok
thats it, this will download all the scrips from both exchange
hope this helps
:thumb: