here are some pictures of an install I did a few months ago...
the black box is the control unit... it holds the dds2 junction box, priming pump circuit, FIA, fuse for system and momentary switch to run the priming pump manually (also controlled by 2D system automatically)...
the pump and related components are located behind the front bumper on the right hand side..
for the water tank, we used a version 8 spec C tank...
I took the DDS2 box apart and made the LEDs remote mount and fit them into the instrument cluster...
sorry for the horrible descriptions, i'm a little lacking in sleep lately