ndsrs is mostly made for my own use, hence the massive lack of instructions
and general user friendliness. simple+efficient > user friendly
Though, I figured I should at least have some instructions for this.

Upgrade Notes:
    As of ndsrs 2.0.0, the the .srs format was completely changed, use
        old2new.py to update your files. 
    Due to how it is now set up, .conf files are no longer needed untill I
        find another use for them.
    .rep file is completely the same and will continue working.
    
Setup:
    make ndsrs/ folder on the root of your ds cart.
    put ndsrs.nds and menu.raw into ndsrs/
    download default.ttf off DH, or supply your own font file.
    make .srs file and place into ndsrs/
    
Making .srs files:
    showing though example, since it seems easier than explaining
    <deck>
      <card type="multi">
        <question>What is your favorite color?</question>
        <answer tf="false">Red</answer>
        <answer tf="false">Green</answer>
        <answer tf="true">Blue</answer>
        <answer tf="false">Purple</answer>
        <explanation>I dont remember enough of the movie to quote anything else</explanation>
      </card>
      <card>
        <question>Here is an example using the new features</question>
        <answer>I am some text!</answer>
        <answer type="image">data/img/math.png</answer>
        <answer type="sound">data/snd/beep.wav</answer>
      </card>
      <card>
        <question type="image">data/img/file.png</question>
        <answer size="24">And here is some large text</answer>
      </card>
    </deck>

    use | for newlines (\n)

File Formats:
    Images:
        Only .png files are currently supported (not likely to change)
        Full alpha blending support
        256x180px max size
    Sound:
        22050Hz, 16bit, 1channel .wav support, for optimal performance:
            sox infile.ogg -r 22050 -2 -c 1 outfile.wav
            sox can be found at http://sox.sf.net

Usage:
    Select Screen:
        A/B: select deck
        Y: move all cards up 1 day

    Review:
        A/B: show answer
        X: Doodle mode
        Y: card stats
        Up/Down: change score
        Left/Right change bottom page
        start: next card
        
    Doodle:
        X: exit doodle mode
        L/R: clear

    Misc:
        select: change backlight intensity
        L+A: autohinting on/off
        L+R+Y: back to file select
    
    Touch screen:
        0-4: scoring
        left arrow: answer card left
        stick guy: doodle mode
        explosion thing: display answer
        squiggly lines: show card stats
        right arrow: answer card right
        
        touch effect is activated when stylus is removed from the screen
            while hovering over one of these squares.
    
    Multiple Choice:
        Multiple choice is implemented in a rather unwieldy fashion.
        Each option gets its own answer page. To select an answer, hit B on
            the frame you wish to select, a "Correct"/"Incorrect" will appear
            on the bottom screen. Press Start to go to the next card
        Upon selection, if 'explanation' is set (see example), the top card
            will change to the content in explanation. This is optional.
        A score of 1 is set if you get it incorrect; a score of 4 is set if
            it is still in InitialState(see schedule.cpp for explanation of
            the algorithm), and a score of 3 otherwise.

Note:
    Paths are important, DS is crappy with paths so everything has to be
        hardcoded in. everything should reside in the /ndsrs/ folder
    Autohinting is now an option since I found that its what was making the
        text rendering so incredibly slow. So you have the option to alternate
        between slow high quality text or fast low quality text.