Using a voltage divider with buried zener voltage reference
IMO trying to tweak dividers and multiple op-amp buffers is a bit passé.
Since you already have a MAX5541 16 bit DAC on your board, which I assume is using your MAX6225 as its reference, you could simply generate the 2V and 1V references from that and store it in a Maxim DS4303. 

The DS4303 will provide a 12bit resolution of your reference voltage, but you can tweak the expected output if you have an accurate enough 4-6 digit multimeter.