Can you provide instructions on how to hook this up to 6 uf008 lights?

You can buy a power pack from outside, we donot recommend you to use this with uf008 lights.

Is there an integration API for Building automation? How do we communicate to it from BMS?

I am afraid, there is no integration API for building automation.

Does PP001 come wiht the wireless remote? IF not which remote do I order?

PP001 donot comes witha remote it is operated via switch i.e. PP003. You have to buy both of these together.

how to hook up two led flat panel light to operate off of one dimmer 0-10 volts

This Dimming Module with J-BOX can control 15-panel pieces, however if you want to control only 2 panels then you should not go for power pack then in this case you can buy individual dimmers for 2 panels.