Don't use Sketchup for making models for EM4. You will have problems getting it into the right format for the game. Use Zmodeler2, the free version will be fine.
I don't think the police officers and paramedics you will have seen in the pics so far are the ones that will be in the first version of the mod that will be released.
Nice pics! @forensics: The fire cheif can send more units to the scene. There is the one in that picture and there is one with a yellow and black chequered vest.
There is a foam module which has a cannon on top, there is a water tank which you can connect 2 hoses to, there is a USAR module which has a digger, and a decontamination module. I'm not sure if the Welfare Module actually does anything though.