Can I use parboiled basmati rice just like ordinary non-converted basmati?
Parboiled rice should be cooked more or less the same way, but may come out a little less sticky than regular rice. It should taste exactly the same. Your recipes should work just fine. 

I would probably do a trial run with a quick batch of the plain rice as you would normally do it just to make sure since parboiling as a process is different in different parts of the world.

Good luck!