I don't need 200 ( at my level, I barely know what to do with 20!), but I can't figure out how to access even the basic maatras. I have been trying combinations of the CTRL and Alt keys, but so far I have been unable to add any of the "subscript" (for want of a better word) dependent vowel forms, the ones on the middle row in this screenshot - http://maxqnz.com/maatras.jpg.

I have figured out many of the basic conjuncts, but a few that have already featured in my coursebooks are still eluding me, along with many of the maatras. It horrifies me that I'm actually going to have to learn to write this fiendish script, instead of just tapping it out on the keyboard!