Not mine to upload, but you can download it here:
For some reason, I thought all 3 downloads joeghostbuster mentioned in his first post were from Mod The Sims. That makes this the 4th version of the Firehouse (it's called the Ghosthunter Station on MTS). The layout is very playable with only a few routing point issues at the stairs, which you can expect whenever stairs are involved.
The Containment Room I left pretty much as is.
First Floor I changed out the Front Door for a Red Garage Door, reworked Janine / Venkman's Office, changed the Colunms, Lights and Decor. Added lots of Parking and a Pond / Fountain to the outside area.
2nd Floor I moved the Pole into the Kitchen.
3rd Floor I converted 2 rooms into Bedrooms for Janine and Kylie.